From Red Hat Security Advisory 2008:0972 :

Updated kernel packages that resolve several security issues and fix various bugs are now available for Red Hat Enterprise Linux 4.

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.

* 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.

All Red Hat Enterprise Linux 4 Users should upgrade to these updated packages, which contain backported patches to correct these issues.

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-2007-6716     Joe Jin reported a local denial of service vulnerability     that allows system users to trigger an oops due to an     improperly initialized data structure.

  - CVE-2008-1514     Jan Kratochvil reported a local denial of service     vulnerability in the ptrace interface for the s390     architecture. Local users can trigger an invalid pointer     dereference, leading to a system panic.

  - CVE-2008-3276     Eugene Teo reported an integer overflow in the DCCP     subsystem that may allow remote attackers to cause a     denial of service in the form of a kernel panic.

  - CVE-2008-3525     Eugene Teo reported a lack of capability checks in the     kernel driver for Granch SBNI12 leased line adapters     (sbni), allowing local users to perform privileged     operations.

  - CVE-2008-3833     The S_ISUID/S_ISGID bits were not being cleared during     an inode splice, which, under certain conditions, can be     exploited by local users to obtain the privileges of a     group for which they are not a member. Mark Fasheh     reported this issue.

  - CVE-2008-4210     David Watson reported an issue in the open()/creat()     system calls which, under certain conditions, can be     exploited by local users to obtain the privileges of a     group for which they are not a member.

  - CVE-2008-4302     A coding error in the splice subsystem allows local     users to attempt to unlock a page structure that has not     been locked, resulting in a system crash.

This kernel update fixes various bugs and also several security issues :

CVE-2008-4576: Fixed a crash in SCTP INIT-ACK, on mismatch between SCTP AUTH availability. This might be exploited remotely for a denial of service (crash) attack.

CVE-2008-3833: The generic_file_splice_write function in fs/splice.c in the Linux kernel does not properly strip setuid and setgid bits when there is a write to a file, which allows local users to gain the privileges of a different group, and obtain sensitive information or possibly have unspecified other impact, by splicing into an inode in order to create an executable file in a setgid directory.

CVE-2008-4210: fs/open.c in the Linux kernel before 2.6.22 does not properly strip setuid and setgid bits when there is a write to a file, which allows local users to gain the privileges of a different group, and obtain sensitive information or possibly have unspecified other impact, by creating an executable file in a setgid directory through the (1) truncate or (2) ftruncate function in conjunction with memory-mapped I/O.

CVE-2008-4302: fs/splice.c in the splice subsystem in the Linux kernel before 2.6.22.2 does not properly handle a failure of the add_to_page_cache_lru function, and subsequently attempts to unlock a page that was not locked, which allows local users to cause a denial of service (kernel BUG and system crash), as demonstrated by the fio I/O tool.

CVE-2008-3528: 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-2007-6716: 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-2008-3525: Added missing capability checks in sbni_ioctl().

CVE-2008-3272: Fixed range checking in the snd_seq OSS ioctl, which could be used to leak information from the kernel.

CVE-2008-2931: The do_change_type function in fs/namespace.c did not verify that the caller has the CAP_SYS_ADMIN capability, which allows local users to gain privileges or cause a denial of service by modifying the properties of a mountpoint.

CVE-2008-2812: Various NULL ptr checks have been added to tty op functions, which might have been used by local attackers to execute code. We think that this affects only devices openable by root, so the impact is limited.

CVE-2008-1673: Added range checking in ASN.1 handling for the CIFS and SNMP NAT netfilter modules.

CVE-2008-3527: arch/i386/kernel/sysenter.c in the Virtual Dynamic Shared Objects (vDSO) implementation in the Linux kernel before 2.6.21 did not properly check boundaries, which allows local users to gain privileges or cause a denial of service via unspecified vectors, related to the install_special_mapping, syscall, and syscall32_nopage functions.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2008-0957.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2008-0973.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2008-0972.

ID	名稱	產品	系列	已發布	已更新	嚴重性
67762	Oracle Linux 4 : kernel (ELSA-2008-0972)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2021/8/24	medium
34392	Debian DSA-1653-1 : linux-2.6 - denial of service/privilege escalation	Nessus	Debian Local Security Checks	2008/10/14	2021/1/4	high
34755	openSUSE 10 Security Update : kernel (kernel-5751)	Nessus	SuSE Local Security Checks	2008/11/12	2021/1/14	critical
801458	CentOS RHSA-2008-0957 Security Check	Log Correlation Engine	Generic			high
801460	CentOS RHSA-2008-0973 Security Check	Log Correlation Engine	Generic			high
801459	CentOS RHSA-2008-0972 Security Check	Log Correlation Engine	Generic			high

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