Updated kernel packages that fix several security issues in the Red Hat Enterprise Linux 3 kernel are now available.

This security advisory has been rated as having important security impact by the Red Hat Security Response Team.

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues described below :

* a flaw in the IPC shared-memory implementation that allowed a local user to cause a denial of service (deadlock) that resulted in freezing the system (CVE-2006-4342, Important)

* an information leak in the copy_from_user() implementation on s390 and s390x platforms that allowed a local user to read arbitrary kernel memory (CVE-2006-5174, Important)

* a flaw in the ATM subsystem affecting systems with installed ATM hardware and configured ATM support that allowed a remote user to cause a denial of service (panic) by accessing socket buffer memory after it has been freed (CVE-2006-4997, Moderate)

* a directory traversal vulnerability in smbfs that allowed a local user to escape chroot restrictions for an SMB-mounted filesystem via '..\\' sequences (CVE-2006-1864, Moderate)

* a flaw in the mprotect system call that allowed enabling write permission for a read-only attachment of shared memory (CVE-2006-2071, Moderate)

* a flaw in the DVD handling of the CDROM driver that could be used together with a custom built USB device to gain root privileges (CVE-2006-2935, Moderate)

In addition to the security issues described above, a bug fix for a clock skew problem (which could lead to unintended keyboard repeat under X11) was also included. The problem only occurred when running the 32-bit x86 kernel on 64-bit dual-core x86_64 hardware.

Note: The kernel-unsupported package contains various drivers and modules that are unsupported and therefore might contain security problems that have not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their kernels to the packages associated with their machine architecture and configurations as listed in this erratum.

A number of vulnerabilities were discovered and corrected in the Linux 2.6 kernel :

Prior to and including 2.6.16-rc2, when running on x86_64 systems with preemption enabled, local users can cause a DoS (oops) via multiple ptrace tasks that perform single steps (CVE-2006-1066).

Prior to 2.6.16, a directory traversal vulnerability in CIFS could allow a local user to escape chroot restrictions for an SMB-mounted filesystem via '..\' sequences (CVE-2006-1863).

Prior to 2.6.16, a directory traversal vulnerability in smbfs could allow a local user to escape chroot restrictions for an SMB-mounted filesystem via '..\' sequences (CVE-2006-1864).

Prior to to 2.6.16.23, SCTP conntrack in netfilter allows remote attackers to cause a DoS (crash) via a packet without any chunks, causing a variable to contain an invalid value that is later used to dereference a pointer (CVE-2006-2934).

The dvd_read_bca function in the DVD handling code assigns the wrong value to a length variable, which could allow local users to execute arbitrary code via a crafted USB storage device that triggers a buffer overflow (CVE-2006-2935).

Prior to 2.6.17, the ftdi_sio driver could allow local users to cause a DoS (memory consumption) by writing more data to the serial port than the hardware can handle, causing the data to be queued (CVE-2006-2936).

The 2.6 kernel, when using both NFS and EXT3, allowed remote attackers to cause a DoS (file system panic) via a crafted UDP packet with a V2 lookup procedure that specifies a bad file handle (inode number), triggering an error and causing an exported directory to be remounted read-only (CVE-2006-3468).

The 2.6 kernel's SCTP was found to cause system crashes and allow for the possibility of local privilege escalation due to a bug in the get_user_iov_size() function that doesn't properly handle overflow when calculating the length of iovec (CVE-2006-3745).

The provided packages are patched to fix these vulnerabilities. All users are encouraged to upgrade to these updated kernels immediately and reboot to effect the fixes.

In addition to these security fixes, other fixes have been included such as :

  - added support for new devices: o Testo products in     usb-serial o ATI SB600 IDE o ULI M-1573 south Bridge o     PATA and SATA support for nVidia MCP55, MCP61, MCP65,     and AMD CS5536 o Asus W6A motherboard in snd-hda-intel o     bcm 5780

  - fixed ip_gre module unload OOPS

    - enabled opti621 driver for x86 and x86_64

    - fixed a local DoS introduced by an imcomplete fix for       CVE-2006-2445

    - updated to Xen 3.0.1 with selected fixes

    - enable hugetlbfs

To update your kernel, please follow the directions located at :

http://www.mandriva.com/en/security/kernelupdate

Red Hat セキュリティアドバイザリ 2006:0710 から：

Red Hat Enterprise Linux 3 カーネルで、いくつかのセキュリティ問題を修正する更新済みのカーネルパッケージが現在利用可能です。

Red Hat セキュリティレスポンスチームは、このセキュリティアドバイザリに重大なセキュリティ上の影響があると評価しています。

Linux カーネルで、オペレーティングシステムの基本関数を処理します。

これらの新しいカーネルパッケージには、以下に説明するセキュリティ問題の修正が含まれています。

* IPC 共有メモリ実装の欠陥により、ローカルユーザーがサービス拒否（デッドロック）を引き起こし、システムをフリーズさせることが可能でした（CVE-2006-4342、重要度高）。

* s390 および s390x プラットフォームの copy_from_user() の実装の情報漏洩により、ローカルユーザーが、任意のカーネルメモリを読み取ることが可能でした（CVE-2006-5174、重要度高）

* ATM ハードウェアをインストールされ、ATM サポートが構成されたシステムに影響する ATM サブシステムの欠陥により、解放された後のソケットバッファメモリにアクセスすることで、リモートユーザーがサービス拒否（パニック）を引き起こすことが可能でした（CVE-2006-4997、重要度中）

* smbfs のディレクトリトラバーサルの脆弱性により、ローカルユーザーが「..\\」というシーケンスを介して、SMB マウントされたファイルシステムのための chroot 制限を逃れることが可能でした（CVE-2006-1864、重要度中）

* mprotect システムコールの欠陥により、共有メモリの読み取り専用添付ファイルで書き込み権限が有効化されることが可能でした（CVE-2006-2071、重要度中）

* root 権限を取得するためにカスタムビルドの USB デバイスと併用される可能性がある CDROM ドライバーの DVD 処理の欠陥（CVE-2006-2935、重要度中）

上記のセキュリティ問題に加えて、クロック歪み問題（これより X11 で意図しないキーボードリピートが発生する可能性があります）のバグ修正も含まれています。この問題は、64 ビットデュアルコア x86_64 ハードウェアで 32 ビット x86 カーネルを実行する際にのみ発生します。

注：カーネルがサポートしていないパッケージにはサポートされていないさまざまなドライバーとモジュールがあるため、まだ対処されていないセキュリティ問題があるかもしれません。

Red Hat Enterprise Linux 3 の全ユーザーは、このエラータに記載されているマシンアーキテクチャと構成に関連づけられたパッケージへ、カーネルをアップグレードすることが推奨されます。

Updated kernel packages that fix a number of security issues as well as other bugs are now available for Red Hat Enterprise Linux 2.1 (32 bit architectures)

This security advisory has been rated as having important security impact by the Red Hat Security Response Team.

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues described below :

* a flaw in the USB devio handling of device removal that allowed a local user to cause a denial of service (crash) (CVE-2005-3055, moderate)

* a flaw in ROSE due to missing verification of the ndigis argument of new routes (CVE-2005-3273, moderate)

* an info leak on AMD-based x86 systems that allowed a local user to retrieve the floating point exception state of a process run by a different user (CVE-2006-1056, important)

* a minor info leak in socket name handling in the network code (CVE-2006-1342, low)

* a minor info leak in socket option handling in the network code (CVE-2006-1343, low)

* a directory traversal vulnerability in smbfs that allowed a local user to escape chroot restrictions for an SMB-mounted filesystem via '..\\' sequences (CVE-2006-1864, moderate)

* a flaw in the mprotect system call that allowed to give write permission to a readonly attachment of shared memory (CVE-2006-2071, moderate)

A performance bug in the NFS implementation that caused clients to frequently pause when sending TCP segments during heavy write loads was also addressed.

All Red Hat Enterprise Linux 2.1 users are advised to upgrade their kernels to these updated packages, which contain backported fixes to correct these issues.

From Red Hat Security Advisory 2006:0710 :

Updated kernel packages that fix several security issues in the Red Hat Enterprise Linux 3 kernel are now available.

This security advisory has been rated as having important security impact by the Red Hat Security Response Team.

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues described below :

* a flaw in the IPC shared-memory implementation that allowed a local user to cause a denial of service (deadlock) that resulted in freezing the system (CVE-2006-4342, Important)

* an information leak in the copy_from_user() implementation on s390 and s390x platforms that allowed a local user to read arbitrary kernel memory (CVE-2006-5174, Important)

* a flaw in the ATM subsystem affecting systems with installed ATM hardware and configured ATM support that allowed a remote user to cause a denial of service (panic) by accessing socket buffer memory after it has been freed (CVE-2006-4997, Moderate)

* a directory traversal vulnerability in smbfs that allowed a local user to escape chroot restrictions for an SMB-mounted filesystem via '..\\' sequences (CVE-2006-1864, Moderate)

* a flaw in the mprotect system call that allowed enabling write permission for a read-only attachment of shared memory (CVE-2006-2071, Moderate)

* a flaw in the DVD handling of the CDROM driver that could be used together with a custom built USB device to gain root privileges (CVE-2006-2935, Moderate)

In addition to the security issues described above, a bug fix for a clock skew problem (which could lead to unintended keyboard repeat under X11) was also included. The problem only occurred when running the 32-bit x86 kernel on 64-bit dual-core x86_64 hardware.

Note: The kernel-unsupported package contains various drivers and modules that are unsupported and therefore might contain security problems that have not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their kernels to the packages associated with their machine architecture and configurations as listed in this erratum.

來自 Red Hat 安全性公告 2006:0710：

現已提供適用於 Red Hat Enterprise Linux 3 核心的更新版核心套件，可修正數個安全性問題。

Red Hat 安全性回應團隊已將此安全性公告的安全性影響程度評為重要。

Linux 核心負責處理作業系統的基本功能。

這些新的核心套件包含如下所述之安全性問題的修正：

* IPC 共用記憶體實作中的一個瑕疵允許本機使用者造成拒絕服務 (鎖死)，進而導致凍結系統 (CVE-2006-4342，重要)

* s390 與 s390x 平台上 copy_from_user() 實作的資訊洩漏允許本機使用者讀取任意核心記憶體 (CVE-2006-5174，重要)

* 以安裝的 ATM 硬體與設定的 ATM 支援影響系統之 ATM 子系統中的一個瑕疵，允許遠端使用者在釋放通訊端緩衝區記憶體之後存取該記憶體，進而造成拒絕服務 (錯誤) (CVE-2006-4997，中等)

* smbfs 中的目錄遊走弱點允許本機使用者透過 '..\\' 序列逸出已掛載 SMB 的檔案系統的 chroot 限制 (CVE-2006-1864，中等)

* mprotect 系統呼叫中的一個瑕疵，允許針對共用記憶體的唯讀附件啟用寫入權限 (CVE-2006-2071，中等)

* CDROM 驅動程式的 DVD 處理方式有一個瑕疵，可搭配自訂的 USB 裝置使用來取得 root 權限 (CVE-2006-2935，中等)

除了上述安全性問題以外，也包含了一個時鐘扭曲問題 (其可導致在 X11 之下發生非預定鍵盤重複) 的錯誤修正。此問題只會於在 64 位元雙核心 x86_64 硬體上執行 32 位元 x86 核心時發生。

注意：不支援核心的套件中包含各種不受支援的驅動程式和模組，因而可能會有無法解決的安全性問題。

建議所有 Red Hat Enterprise Linux 3 使用者皆根據所用之機器架構和組態，將核心升級至此錯字勘誤表中所列的對應套件。

来自 Red Hat 安全公告 2006:0710：

现在可以使用更新后的 kernel 程序包，用于修复 Red Hat Enterprise Linux 3 内核中的多个安全问题。

Red Hat 安全响应团队将此安全公告评级为具有重要安全影响。

Linux 内核处理操作系统的基本功能。

这些新的内核程序包修复了以下安全问题：

* IPC shared-memory 实现中的一个缺陷，允许本地用户造成可导致系统冻结的拒绝服务（死锁）（CVE-2006-4342，重要）

* s390 和 s390x 平台上 copy_from_user() 中的一个信息泄漏，允许本地用户读取任意内核内存（CVE-2006-5174，重要）

* ATM 子系统中对安装了 ATM 硬件并配置了 ATM 支持的系统造成影响的一个缺陷，允许远程用户通过在释放了套接字缓冲区内存之后对其进行访问来造成拒绝服务（混乱）（CVE-2006-4997，中危）

* smbfs 中的一个目录遍历漏洞，允许本地用户通过“..\\”序列避开挂载了 SMB 文件系统的 chroot 限制（CVE-2006-1864，中危）

* mprotect 系统调用中的一个缺陷，允许启用对共享内存的只读附件的写入权限（CVE-2006-2071，中危）

* CDROM 驱动程序的 DVD 处理存在一个缺陷，将该缺陷与自定义构建的 USB 设备结合使用可获得根权限（CVE-2006-2935，中危）

除了上述安全问题，还包括一个针对时钟偏移问题的缺陷补丁（该问题可在 X11 下导致非预期的键盘重复）。只有在 64 位双核 x86_64 硬件上运行 32 位 x86 时才会发生该问题。

注意：不支持内核的程序包含各种不受支持的驱动程序和模块，因此可能包含尚未解决的安全问题。

建议所有 Red Hat Enterprise Linux 3 用户将其内核升级到与此勘误表中列出的计算机架构及配置相关的程序包。

An integer overflow was discovered in the do_replace() function. A local user process with the CAP_NET_ADMIN capability could exploit this to execute arbitrary commands with full root privileges. However, none of Ubuntu's supported packages use this capability with any non-root user, so this only affects you if you use some third party software like the OpenVZ virtualization system. (CVE-2006-0038)

On EMT64 CPUs, the kernel did not properly handle uncanonical return addresses. A local user could exploit this to trigger a kernel crash.
(CVE-2006-0744)

Al Viro discovered a local Denial of Service in the sysfs write buffer handling. By writing a block with a length exactly equal to the processor's page size to any writable file in /sys, a local attacker could cause a kernel crash. (CVE-2006-1055)

Jan Beulich discovered an information leak in the handling of registers for the numeric coprocessor when running on AMD processors.
This allowed processes to see the coprocessor execution state of other processes, which could reveal sensitive data in the case of cryptographic computations. (CVE-2006-1056)

Marcel Holtmann discovered that the sys_add_key() did not check that a new user key is added to a proper keyring. By attempting to add a key to a normal user key (which is not a keyring), a local attacker could exploit this to crash the kernel. (CVE-2006-1522)

Ingo Molnar discovered that the SCTP protocol connection tracking module in netfilter got stuck in an infinite loop on certain empty packet chunks. A remote attacker could exploit this to cause the computer to hang. (CVE-2006-1527)

The SCSI I/O driver did not correctly handle the VM_IO flag for memory mapped pages used for data transfer. A local user could exploit this to cause a kernel crash. (CVE-2006-1528)

The choose_new_parent() contained obsolete debugging code. A local user could exploit this to cause a kernel crash. (CVE-2006-1855)

Kostik Belousov discovered that the readv() and writev() functions did not query LSM modules for access permission. This could be exploited to circumvent access restrictions defined by LSM modules such as SELinux or AppArmor. (CVE-2006-1856)

The SCTP driver did not properly verify certain parameters when receiving a HB-ACK chunk. By sending a specially crafted packet to an SCTP socket, a remote attacker could exploit this to trigger a buffer overflow, which could lead to a crash or possibly even arbitrary code execution. (CVE-2006-1857)

The sctp_walk_params() function in the SCTP driver incorrectly used rounded values for bounds checking instead of the precise values. By sending a specially crafted packet to an SCTP socket, a remote attacker could exploit this to crash the kernel. (CVE-2006-1858)

Bjoern Steinbrink reported a memory leak in the __setlease() function.
A local attacker could exploit this to exhaust kernel memory and render the computer unusable (Denial of Service). (CVE-2006-1859)

Daniel Hokka Zakrisson discovered that the lease_init() did not properly handle locking. A local attacker could exploit this to cause a kernel deadlock (Denial of Service). (CVE-2006-1860)

Mark Moseley discovered that the CIFS file system driver did not filter out '..\\' path components. A local attacker could exploit this to break out of a chroot environment on a mounted SMB share.
(CVE-2006-1863) The same vulnerability applies to the older smb file system. (CVE-2006-1864)

Hugh Dickins discovered that the mprotect() function allowed an user to change a read-only shared memory attachment to become writable, which bypasses IPC (inter-process communication) permissions.
(CVE-2006-2071)

The SCTP (Stream Control Transmission Protocol) driver triggered a kernel panic on unexpected packets while the session was in the CLOSED state, instead of silently ignoring the packets. A remote attacker could exploit this to crash the computer. (CVE-2006-2271)

The SCTP driver did not handle control chunks if they arrived in fragmented packets. By sending specially crafted packets to an SCTP socket, a remote attacker could exploit this to crash the target machine. (CVE-2006-2272)

The SCTP driver did not correctly handle packets containing more than one DATA fragment. By sending specially crafted packets to an SCTP socket, a remote attacker could exploit this to crash the target machine. (CVE-2006-2274)

The SCTP driver did not correcly buffer incoming packets. By sending a large number of small messages to a receiver application that cannot process the messages quickly enough, a remote attacker could exploit this to cause a deadlock in the target machine (Denial of Service).
(CVE-2006-2275)

Patrick McHardy discovered that the snmp_trap_decode() function did not correctly handle memory allocation in some error conditions. By sending specially crafted packets to a machine which uses the SNMP network address translation (NAT), a remote attacker could exploit this to crash that machine. (CVE-2006-2444)

In addition, the Ubuntu 6.06 LTS update fixes a range of bugs.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2005-3359     Franz Filz discovered that some socket calls permit     causing inconsistent reference counts on loadable     modules, which allows local users to cause a denial of     service.

  - CVE-2006-0038     'Solar Designer' discovered that arithmetic computations     in netfilter's do_replace() function can lead to a     buffer overflow and the execution of arbitrary code.
    However, the operation requires CAP_NET_ADMIN     privileges, which is only an issue in virtualization     systems or fine grained access control systems.

  - CVE-2006-0039     'Solar Designer' discovered a race condition in     netfilter's do_add_counters() function, which allows     information disclosure of kernel memory by exploiting a     race condition. Likewise, it requires CAP_NET_ADMIN     privileges. 

  - CVE-2006-0456     David Howells discovered that the s390 assembly version     of the strnlen_user() function incorrectly returns some     string size values.

  - CVE-2006-0554     It was discovered that the ftruncate() function of XFS     can expose unallocated blocks, which allows information     disclosure of previously deleted files.

  - CVE-2006-0555     It was discovered that some NFS file operations on     handles mounted with O_DIRECT can force the kernel into     a crash.

  - CVE-2006-0557     It was discovered that the code to configure memory     policies allows tricking the kernel into a crash, thus     allowing denial of service.

  - CVE-2006-0558     It was discovered by Cliff Wickman that perfmon for the     IA64 architecture allows users to trigger a BUG()     assert, which allows denial of service.

  - CVE-2006-0741     Intel EM64T systems were discovered to be susceptible to     a local DoS due to an endless recursive fault related to     a bad ELF entry address.

  - CVE-2006-0742     Alan and Gareth discovered that the ia64 platform had an     incorrectly declared die_if_kernel() function as 'does     never return' which could be exploited by a local     attacker resulting in a kernel crash.

  - CVE-2006-0744     The Linux kernel did not properly handle uncanonical     return addresses on Intel EM64T CPUs, reporting     exceptions in the SYSRET instead of the next     instruction, causing the kernel exception handler to run     on the user stack with the wrong GS. This may result in     a DoS due to a local user changing the frames.

  - CVE-2006-1056     AMD64 machines (and other 7th and 8th generation     AuthenticAMD processors) were found to be vulnerable to     sensitive information leakage, due to how they handle     saving and restoring the FOP, FIP, and FDP x87 registers     in FXSAVE/FXRSTOR when an exception is pending. This     allows a process to determine portions of the state of     floating point instructions of other processes.

  - CVE-2006-1242     Marco Ivaldi discovered that there was an unintended     information disclosure allowing remote attackers to     bypass protections against Idle Scans (nmap -sI) by     abusing the ID field of IP packets and bypassing the     zero IP ID in DF packet countermeasure. This was a     result of the ip_push_pending_frames function improperly     incremented the IP ID field when sending a RST after     receiving unsolicited TCP SYN-ACK packets.

  - CVE-2006-1368     Shaun Tancheff discovered a buffer overflow (boundary     condition error) in the USB Gadget RNDIS implementation     allowing remote attackers to cause a DoS. While creating     a reply message, the driver allocated memory for the     reply data, but not for the reply structure. The kernel     fails to properly bounds-check user-supplied data before     copying it to an insufficiently sized memory buffer.
    Attackers could crash the system, or possibly execute     arbitrary machine code.

  - CVE-2006-1523     Oleg Nesterov reported an unsafe BUG_ON call in signal.c     which was introduced by RCU signal handling. The BUG_ON     code is protected by siglock while the code in     switch_exit_pids() uses tasklist_lock. It may be     possible for local users to exploit this to initiate a     denial of service attack (DoS).

  - CVE-2006-1524     Hugh Dickins discovered an issue in the madvise_remove()     function wherein file and mmap restrictions are not     followed, allowing local users to bypass IPC permissions     and replace portions of readonly tmpfs files with     zeroes.

  - CVE-2006-1525     Alexandra Kossovsky reported a NULL pointer dereference     condition in ip_route_input() that can be triggered by a     local user by requesting a route for a multicast IP     address, resulting in a denial of service (panic).

  - CVE-2006-1857     Vlad Yasevich reported a data validation issue in the     SCTP subsystem that may allow a remote user to overflow     a buffer using a badly formatted HB-ACK chunk, resulting     in a denial of service.

  - CVE-2006-1858     Vlad Yasevich reported a bug in the bounds checking code     in the SCTP subsystem that may allow a remote attacker     to trigger a denial of service attack when rounded     parameter lengths are used to calculate parameter     lengths instead of the actual values.

  - CVE-2006-1863     Mark Mosely discovered that chroots residing on an CIFS     share can be escaped with specially crafted 'cd'     sequences.

  - CVE-2006-1864     Mark Mosely discovered that chroots residing on an SMB     share can be escaped with specially crafted 'cd'     sequences.

  - CVE-2006-2271     The 'Mu security team' discovered that carefully crafted     ECNE chunks can cause a kernel crash by accessing     incorrect state stable entries in the SCTP networking     subsystem, which allows denial of service.

  - CVE-2006-2272     The 'Mu security team' discovered that fragmented SCTP     control chunks can trigger kernel panics, which allows     for denial of service attacks.

  - CVE-2006-2274     It was discovered that SCTP packets with two initial     bundled data packets can lead to infinite recursion,     which allows for denial of service attacks.

Updated kernel packages that fix several security issues in the Red Hat Enterprise Linux 4 kernel are now available.

This security advisory has been rated as having important security impact by the Red Hat Security Response Team.

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues described below :

* a flaw in the IPv6 implementation that allowed a local user to cause a denial of service (infinite loop and crash) (CVE-2005-2973, important)

* a flaw in the bridge implementation that allowed a remote user to cause forwarding of spoofed packets via poisoning of the forwarding table with already dropped frames (CVE-2005-3272, moderate)

* a flaw in the atm module that allowed a local user to cause a denial of service (panic) via certain socket calls (CVE-2005-3359, important)

* a flaw in the NFS client implementation that allowed a local user to cause a denial of service (panic) via O_DIRECT writes (CVE-2006-0555, important)

* a difference in 'sysretq' operation of EM64T (as opposed to Opteron) processors that allowed a local user to cause a denial of service (crash) upon return from certain system calls (CVE-2006-0741 and CVE-2006-0744, important)

* a flaw in the keyring implementation that allowed a local user to cause a denial of service (OOPS) (CVE-2006-1522, important)

* a flaw in IP routing implementation that allowed a local user to cause a denial of service (panic) via a request for a route for a multicast IP (CVE-2006-1525, important)

* a flaw in the SCTP-netfilter implementation that allowed a remote user to cause a denial of service (infinite loop) (CVE-2006-1527, important)

* a flaw in the sg driver that allowed a local user to cause a denial of service (crash) via a dio transfer to memory mapped (mmap) IO space (CVE-2006-1528, important)

* a flaw in the threading implementation that allowed a local user to cause a denial of service (panic) (CVE-2006-1855, important)

* two missing LSM hooks that allowed a local user to bypass the LSM by using readv() or writev() (CVE-2006-1856, moderate)

* a flaw in the virtual memory implementation that allowed local user to cause a denial of service (panic) by using the lsof command (CVE-2006-1862, important)

* a directory traversal vulnerability in smbfs that allowed a local user to escape chroot restrictions for an SMB-mounted filesystem via '..\\' sequences (CVE-2006-1864, moderate)

* a flaw in the ECNE chunk handling of SCTP that allowed a remote user to cause a denial of service (panic) (CVE-2006-2271, moderate)

* a flaw in the handling of COOKIE_ECHO and HEARTBEAT control chunks of SCTP that allowed a remote user to cause a denial of service (panic) (CVE-2006-2272, moderate)

* a flaw in the handling of DATA fragments of SCTP that allowed a remote user to cause a denial of service (infinite recursion and crash) (CVE-2006-2274, moderate)

All Red Hat Enterprise Linux 4 users are advised to upgrade their kernels to the packages associated with their machine architectures and configurations as listed in this erratum.

Several local and remote vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2006-0038     'Solar Designer' discovered that arithmetic computations     in netfilter's do_replace() function can lead to a     buffer overflow and the execution of arbitrary code.
    However, the operation requires CAP_NET_ADMIN     privileges, which is only an issue in virtualization     systems or fine grained access control systems.

  - CVE-2006-0039     'Solar Designer' discovered a race condition in     netfilter's do_add_counters() function, which allows     information disclosure of kernel memory by exploiting a     race condition. Like CVE-2006-0038, it requires     CAP_NET_ADMIN privileges.

  - CVE-2006-0741     Intel EM64T systems were discovered to be susceptible to     a local DoS due to an endless recursive fault related to     a bad ELF entry address.

  - CVE-2006-0742     Incorrectly declared die_if_kernel() function as 'does     never return' which could be exploited by a local     attacker resulting in a kernel crash.

  - CVE-2006-1056     AMD64 machines (and other 7th and 8th generation     AuthenticAMD processors) were found to be vulnerable to     sensitive information leakage, due to how they handle     saving and restoring the FOP, FIP, and FDP x87 registers     in FXSAVE/FXRSTOR when an exception is pending. This     allows a process to determine portions of the state of     floating point instructions of other processes.

  - CVE-2006-1242     Marco Ivaldi discovered that there was an unintended     information disclosure allowing remote attackers to     bypass protections against Idle Scans (nmap -sI) by     abusing the ID field of IP packets and bypassing the     zero IP ID in DF packet countermeasure. This was a     result of the ip_push_pending_frames function improperly     incremented the IP ID field when sending a RST after     receiving unsolicited TCP SYN-ACK packets.

  - CVE-2006-1343     Pavel Kankovsky reported the existence of a potential     information leak resulting from the failure to     initialize sin.sin_zero in the IPv4 socket code.

  - CVE-2006-1368     Shaun Tancheff discovered a buffer overflow (boundary     condition error) in the USB Gadget RNDIS implementation     allowing remote attackers to cause a DoS. While creating     a reply message, the driver allocated memory for the     reply data, but not for the reply structure. The kernel     fails to properly bounds-check user-supplied data before     copying it to an insufficiently sized memory buffer.
    Attackers could crash the system, or possibly execute     arbitrary machine code.

  - CVE-2006-1524     Hugh Dickins discovered an issue in the madvise_remove()     function wherein file and mmap restrictions are not     followed, allowing local users to bypass IPC permissions     and replace portions of readonly tmpfs files with     zeroes.

  - CVE-2006-1525     Alexandra Kossovsky reported a NULL pointer dereference     condition in ip_route_input() that can be triggered by a     local user by requesting a route for a multicast IP     address, resulting in a denial of service (panic).

  - CVE-2006-1857     Vlad Yasevich reported a data validation issue in the     SCTP subsystem that may allow a remote user to overflow     a buffer using a badly formatted HB-ACK chunk, resulting     in a denial of service.

  - CVE-2006-1858     Vlad Yasevich reported a bug in the bounds checking code     in the SCTP subsystem that may allow a remote attacker     to trigger a denial of service attack when rounded     parameter lengths are used to calculate parameter     lengths instead of the actual values.

  - CVE-2006-1864     Mark Mosely discovered that chroots residing on an SMB     share can be escaped with specially crafted 'cd'     sequences.

  - CVE-2006-2271     The 'Mu security team' discovered that carefully crafted     ECNE chunks can cause a kernel crash by accessing     incorrect state stable entries in the SCTP networking     subsystem, which allows denial of service.

  - CVE-2006-2272     The 'Mu security team' discovered that fragmented SCTP     control chunks can trigger kernel panics, which allows     for denial of service attacks.

  - CVE-2006-2274     It was discovered that SCTP packets with two initial     bundled data packets can lead to infinite recursion,     which allows for denial of service attacks.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2006-0710.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2006-0493.

ID	名稱	產品	系列	已發布	已更新	嚴重性
22918	RHEL 3 : kernel (RHSA-2006:0710)	Nessus	Red Hat Local Security Checks	2006/10/25	2021/1/14	high
23897	Mandrake Linux Security Advisory : kernel (MDKSA-2006:151)	Nessus	Mandriva Local Security Checks	2006/12/16	2021/1/6	high
67413	Oracle Linux 3：カーネル（ELSA-2006-0710）	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/8/24	high
22054	RHEL 2.1 : kernel (RHSA-2006:0579)	Nessus	Red Hat Local Security Checks	2006/7/17	2021/1/14	medium
67413	Oracle Linux 3 : kernel (ELSA-2006-0710)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/8/24	high
67413	Oracle Linux 3：kernel (ELSA-2006-0710)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/8/24	high
67413	Oracle Linux 3：kernel (ELSA-2006-0710)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/8/24	high
27877	Ubuntu 5.04 / 5.10 / 6.06 LTS : linux-source-2.6.10/2.6.12/2.6.15 vulnerabilities (USN-302-1)	Nessus	Ubuntu Local Security Checks	2007/11/10	2021/1/19	high
22645	Debian DSA-1103-1 : kernel-source-2.6.8 - several vulnerabilities	Nessus	Debian Local Security Checks	2006/10/14	2021/1/4	critical
22879	CentOS 3 : kernel (CESA-2006:0710)	Nessus	CentOS Local Security Checks	2006/10/20	2021/1/4	high
21592	RHEL 4 : kernel (RHSA-2006:0493)	Nessus	Red Hat Local Security Checks	2006/5/24	2021/1/14	high
21997	CentOS 4 : kernel (CESA-2006:0493)	Nessus	CentOS Local Security Checks	2006/7/5	2021/1/4	high
22639	Debian DSA-1097-1 : kernel-source-2.4.27 - several vulnerabilities	Nessus	Debian Local Security Checks	2006/10/14	2021/1/4	critical
801423	CentOS RHSA-2006-0710 Security Check	Log Correlation Engine	Generic			high
801418	CentOS RHSA-2006-0493 Security Check	Log Correlation Engine	Generic			high

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