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

  - CVE-2008-3528     Eugene Teo reported a local DoS issue in the ext2 and     ext3 filesystems. Local users who have been granted the     privileges necessary to mount a filesystem would be able     to craft a corrupted filesystem that causes the kernel     to output error messages in an infinite loop.

  - CVE-2008-4554     Milos Szeredi reported that the usage of splice() on     files opened with O_APPEND allows users to write to the     file at arbitrary offsets, enabling a bypass of possible     assumed semantics of the O_APPEND flag.

  - CVE-2008-4576     Vlad Yasevich reported an issue in the SCTP subsystem     that may allow remote users to cause a local DoS by     triggering a kernel oops.

  - CVE-2008-4618     Wei Yongjun reported an issue in the SCTP subsystem that     may allow remote users to cause a local DoS by     triggering a kernel panic.

  - CVE-2008-4933     Eric Sesterhenn reported a local DoS issue in the     hfsplus filesystem. Local users who have been granted     the privileges necessary to mount a filesystem would be     able to craft a corrupted filesystem that causes the     kernel to overrun a buffer, resulting in a system oops     or memory corruption.

  - CVE-2008-4934     Eric Sesterhenn reported a local DoS issue in the     hfsplus filesystem. Local users who have been granted     the privileges necessary to mount a filesystem would be     able to craft a corrupted filesystem that results in a     kernel oops due to an unchecked return value.

  - CVE-2008-5025     Eric Sesterhenn reported a local DoS issue in the hfs     filesystem. Local users who have been granted the     privileges necessary to mount a filesystem would be able     to craft a filesystem with a corrupted catalog name     length, resulting in a system oops or memory corruption.

  - CVE-2008-5029     Andrea Bittau reported a DoS issue in the unix socket     subsystem that allows a local user to cause memory     corruption, resulting in a kernel panic.

  - CVE-2008-5134     Johannes Berg reported a remote DoS issue in the     libertas wireless driver, which can be triggered by a     specially crafted beacon/probe response.

  - CVE-2008-5182     Al Viro reported race conditions in the inotify     subsystem that may allow local users to acquire elevated     privileges.

  - CVE-2008-5300     Dann Frazier reported a DoS condition that allows local     users to cause the out of memory handler to kill off     privileged processes or trigger soft lockups due to a     starvation issue in the unix socket subsystem.

Updated kernel packages that fix several security issues and several bugs are now available for Red Hat Enterprise Linux 5.

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

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security fixes :

* memory leaks were found on some error paths in the icmp_send() function in the Linux kernel. This could, potentially, cause the network connectivity to cease. (CVE-2009-0778, Important)

* Chris Evans reported a deficiency in the clone() system call when called with the CLONE_PARENT flag. This flaw permits the caller (the parent process) to indicate an arbitrary signal it wants to receive when its child process exits. This could lead to a denial of service of the parent process. (CVE-2009-0028, Moderate)

* an off-by-one underflow flaw was found in the eCryptfs subsystem.
This could potentially cause a local denial of service when the readlink() function returned an error. (CVE-2009-0269, Moderate)

* a deficiency was found in the Remote BIOS Update (RBU) driver for Dell systems. This could allow a local, unprivileged user to cause a denial of service by reading zero bytes from the image_type or packet_size files in '/sys/devices/platform/dell_rbu/'.
(CVE-2009-0322, Moderate)

* an inverted logic flaw was found in the SysKonnect FDDI PCI adapter driver, allowing driver statistics to be reset only when the CAP_NET_ADMIN capability was absent (local, unprivileged users could reset driver statistics). (CVE-2009-0675, Moderate)

* the sock_getsockopt() function in the Linux kernel did not properly initialize a data structure that can be directly returned to user-space when the getsockopt() function is called with SO_BSDCOMPAT optname set. This flaw could possibly lead to memory disclosure.
(CVE-2009-0676, Moderate)

* the ext2 and ext3 file system code failed to properly handle corrupted data structures, leading to a possible local denial of service when read or write operations were performed on a specially crafted file system. (CVE-2008-3528, Low)

* a deficiency was found in the libATA implementation. This could, potentially, lead to a local denial of service. Note: by default, the '/dev/sg*' devices are accessible only to the root user.
(CVE-2008-5700, Low)

Bug fixes :

* a bug in aic94xx may have caused kernel panics during boot on some systems with certain SATA disks. (BZ#485909)

* a word endianness problem in the qla2xx driver on PowerPC-based machines may have corrupted flash-based devices. (BZ#485908)

* a memory leak in pipe() may have caused a system deadlock. The workaround in Section 1.5, Known Issues, of the Red Hat Enterprise Linux 5.3 Release Notes Updates, which involved manually allocating extra file descriptors to processes calling do_pipe, is no longer necessary. (BZ#481576)

* CPU soft-lockups in the network rate estimator. (BZ#481746)

* bugs in the ixgbe driver caused it to function unreliably on some systems with 16 or more CPU cores. (BZ#483210)

* the iwl4965 driver may have caused a kernel panic. (BZ#483206)

* a bug caused NFS attributes to not update for some long-lived NFS mounted file systems. (BZ#483201)

* unmounting a GFS2 file system may have caused a panic. (BZ#485910)

* a bug in ptrace() may have caused a panic when single stepping a target. (BZ#487394)

* on some 64-bit systems, notsc was incorrectly set at boot, causing slow gettimeofday() calls. (BZ#488239)

* do_machine_check() cleared all Machine Check Exception (MCE) status registers, preventing the BIOS from using them to determine the cause of certain panics and errors. (BZ#490433)

* scaling problems caused performance problems for LAPI applications.
(BZ#489457)

* a panic may have occurred on systems using certain Intel WiFi Link 5000 products when booting with the RF Kill switch on. (BZ#489846)

* the TSC is invariant with C/P/T states, and always runs at constant frequency from now on. (BZ#489310)

All users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

The remote Redhat Enterprise Linux 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2008:0972 advisory.

  - kernel PWC driver DoS (CVE-2007-5093)

  - kernel: dio: zero struct dio with kzalloc instead of manually (CVE-2007-6716)

  - kernel: ptrace: Padding area write - unprivileged kernel crash (CVE-2008-1514)

  - kernel snd_seq_oss_synth_make_info leak (CVE-2008-3272)

  - Linux kernel ext[234] directory corruption denial of service (CVE-2008-3528)

  - kernel: open() call allows setgid bit when user is not in new file's group (CVE-2008-4210)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This kernel update for SUSE Linux Enterprise 10 Service Pack 2 fixes various bugs and some security problems :

  - When creating a file, open()/creat() allowed the setgid     bit to be set via the mode argument even when, due to     the bsdgroups mount option or the file being created in     a setgid directory, the new file's group is one which     the user is not a member of. The local attacker could     then use ftruncate() and memory-mapped I/O to turn the     new file into an arbitrary binary and thus gain the     privileges of this group, since these operations do not     clear the setgid bit.'. (CVE-2008-4210)

  - The ext[234] filesystem code fails to properly handle     corrupted data structures. With a mounted filesystem     image or partition that have corrupted dir->i_size and     dir->i_blocks, a user performing either a read or write     operation on the mounted image or partition can lead to     a possible denial of service by spamming the logfile.
    (CVE-2008-3528)

  - The S/390 ptrace code allowed local users to cause a     denial of service (kernel panic) via the     user-area-padding test from the ptrace testsuite in     31-bit mode, which triggers an invalid dereference.
    (CVE-2008-1514)

  - fs/direct-io.c in the dio subsystem in the Linux kernel     did not properly zero out the dio struct, which allows     local users to cause a denial of service (OOPS), as     demonstrated by a certain fio test. (CVE-2007-6716)

  - Added missing capability checks in sbni_ioctl().
    (CVE-2008-3525)

Also OCFS2 was updated to version v1.4.1-1.

The full amount of changes can be reviewed in the RPM changelog.

- a flaw was found in the Linux kernel's Direct-IO     implementation. This could have allowed a local     unprivileged user to cause a denial of service.
    (CVE-2007-6716, Important)

  - when running ptrace in 31-bit mode on an IBM S/390 or     IBM System z kernel, a local unprivileged user could     cause a denial of service by reading from or writing     into a padding area in the user_regs_struct32 structure.
    (CVE-2008-1514, Important)

  - the do_truncate() and generic_file_splice_write()     functions did not clear the setuid and setgid bits. This     could have allowed a local unprivileged user to obtain     access to privileged information. (CVE-2008-4210,     Important)

  - Tobias Klein reported a missing check in the Linux     kernel's Open Sound System (OSS) implementation. This     deficiency could have led to an information leak.
    (CVE-2008-3272, Moderate)

  - a potential denial of service attack was discovered in     the Linux kernel's PWC USB video driver. A local     unprivileged user could have used this flaw to bring the     kernel USB subsystem into the busy-waiting state.
    (CVE-2007-5093, Low)

  - the ext2 and ext3 file systems code failed to properly     handle corrupted data structures, leading to a possible     local denial of service issue when read or write     operations were performed. (CVE-2008-3528, Low)

In addition, these updated packages fix the following bugs :

  - when using the CIFS 'forcedirectio' option, appending to     an open file on a CIFS share resulted in that file being     overwritten with the data to be appended.

  - a kernel panic occurred when a device with PCI ID     8086:10c8 was present on a system with a loaded ixgbe     driver.

  - due to an aacraid driver regression, the kernel failed     to boot when trying to load the aacraid driver and     printed the following error message: 'aac_srb:
    aac_fib_send failed with status: 8195'.

  - due to an mpt driver regression, when RAID 1 was     configured on Primergy systems with an LSI SCSI IME     53C1020/1030 controller, the kernel panicked during     boot.

  - the mpt driver produced a large number of extraneous     debugging messages when performing a 'Host reset'     operation.

  - due to a regression in the sym driver, the kernel     panicked when a SCSI hot swap was performed using MCP18     hardware.

  - all cores on a multi-core system now scale their     frequencies in accordance with the policy set by the     system's CPU frequency governor.

  - the netdump subsystem suffered from several stability     issues. These are addressed in this updated kernel.

  - under certain conditions, the ext3 file system reported     a negative count of used blocks.

  - reading /proc/self/mem incorrectly returned 'Invalid     argument' instead of 'input/output error' due to a     regression.

  - under certain conditions, the kernel panicked when a USB     device was removed while the system was busy accessing     the device.

  - a race condition in the kernel could have led to a     kernel crash during the creation of a new process.

ID	名稱	產品	系列	已發布	已更新	嚴重性
35036	Debian DSA-1681-1 : linux-2.6.24 - denial of service/privilege escalation	Nessus	Debian Local Security Checks	2008/12/5	2021/1/4	critical
43729	CentOS 5 : kernel (CESA-2009:0326)	Nessus	CentOS Local Security Checks	2010/1/6	2021/1/4	high
34841	RHEL 4 : kernel (RHSA-2008:0972)	Nessus	Red Hat Local Security Checks	2008/11/21	2024/4/21	medium
41535	SuSE 10 Security Update : Linux kernel (ZYPP Patch Number 5668)	Nessus	SuSE Local Security Checks	2009/9/24	2021/1/14	high
60497	Scientific Linux Security Update : kernel on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	2012/8/1	2021/1/14	medium

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