Some vulnerabilities were discovered and corrected in the Linux 2.6 kernel :

Memory leak in the ipip6_rcv function in net/ipv6/sit.c in the Linux kernel before 2.6.25.3 allows remote attackers to cause a denial of service (memory consumption) via network traffic to a Simple Internet Transition (SIT) tunnel interface, related to the pskb_may_pull and kfree_skb functions, and management of an skb reference count.
(CVE-2008-2136)

The utimensat system call (sys_utimensat) in Linux kernel 2.6.22 and other versions before 2.6.25.3 does not check file permissions when certain UTIME_NOW and UTIME_OMIT combinations are used, which allows local users to modify file times of arbitrary files, possibly leading to a denial of service. (CVE-2008-2148)

Integer overflow in the dccp_feat_change function in net/dccp/feat.c in the Datagram Congestion Control Protocol (DCCP) subsystem in the Linux kernel 2.6.18, and 2.6.17 through 2.6.20, allows local users to gain privileges via an invalid feature length, which leads to a heap-based buffer overflow. (CVE-2008-2358)

The pppol2tp_recvmsg function in drivers/net/pppol2tp.c in the Linux kernel 2.6 before 2.6.26-rc6 allows remote attackers to cause a denial of service (kernel heap memory corruption and system crash) and possibly have unspecified other impact via a crafted PPPOL2TP packet that results in a large value for a certain length variable.
(CVE-2008-2750)

Linux kernel 2.6.18, and possibly other versions, when running on AMD64 architectures, allows local users to cause a denial of service (crash) via certain ptrace calls. (CVE-2008-1615)

Integer overflow in the sctp_getsockopt_local_addrs_old function in net/sctp/socket.c in the Stream Control Transmission Protocol (sctp) functionality in the Linux kernel before 2.6.25.9 allows local users to cause a denial of service (resource consumption and system outage) via vectors involving a large addr_num field in an sctp_getaddrs_old data structure. (CVE-2008-2826)

Race condition in the directory notification subsystem (dnotify) in Linux kernel 2.6.x before 2.6.24.6, and 2.6.25 before 2.6.25.1, allows local users to cause a denial of service (OOPS) and possibly gain privileges via unspecified vectors. (CVE-2008-1375)

The bdx_ioctl_priv function in the tehuti driver (tehuti.c) in Linux kernel 2.6.x before 2.6.25.1 does not properly check certain information related to register size, which has unspecified impact and local attack vectors, probably related to reading or writing kernel memory. (CVE-2008-1675)

Linux kernel before 2.6.25.2 does not apply a certain protection mechanism for fcntl functionality, which allows local users to (1) execute code in parallel or (2) exploit a race condition to obtain re-ordered access to the descriptor table. (CVE-2008-1669)

Additionaly, a number of fixes has been included for the rtc driver, Arima W651DI audio chipset, unionfs, as well as Tomoyolinux has been updated to 1.6.3, UDF 2.50 support was added, and a few things more.
Check the package changelog for more details.

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

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

Dirk Nehring discovered that the IPsec protocol stack did not correctly handle fragmented ESP packets. A remote attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2007-6282)

Johannes Bauer discovered that the 64bit kernel did not correctly handle hrtimer updates. A local attacker could request a large expiration value and cause the system to hang, leading to a denial of service. (CVE-2007-6712)

Tavis Ormandy discovered that the ia32 emulation under 64bit kernels did not fully clear uninitialized data. A local attacker could read private kernel memory, leading to a loss of privacy. (CVE-2008-0598)

Jan Kratochvil discovered that PTRACE did not correctly handle certain calls when running under 64bit kernels. A local attacker could exploit this to crash the system, leading to a denial of service.
(CVE-2008-1615)

Wei Wang discovered that the ASN.1 decoding routines in CIFS and SNMP NAT did not correctly handle certain length values. Remote attackers could exploit this to execute arbitrary code or crash the system.
(CVE-2008-1673)

Paul Marks discovered that the SIT interfaces did not correctly manage allocated memory. A remote attacker could exploit this to fill all available memory, leading to a denial of service. (CVE-2008-2136)

David Miller and Jan Lieskovsky discovered that the Sparc kernel did not correctly range-check memory regions allocated with mmap. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2008-2137)

The sys_utimensat system call did not correctly check file permissions in certain situations. A local attacker could exploit this to modify the file times of arbitrary files which could lead to a denial of service. (CVE-2008-2148)

Brandon Edwards discovered that the DCCP system in the kernel did not correctly check feature lengths. A remote attacker could exploit this to execute arbitrary code. (CVE-2008-2358)

A race condition was discovered between ptrace and utrace in the kernel. A local attacker could exploit this to crash the system, leading to a denial of service. (CVE-2008-2365)

The copy_to_user routine in the kernel did not correctly clear memory destination addresses when running on 64bit kernels. A local attacker could exploit this to gain access to sensitive kernel memory, leading to a loss of privacy. (CVE-2008-2729)

The PPP over L2TP routines in the kernel did not correctly handle certain messages. A remote attacker could send a specially crafted packet that could crash the system or execute arbitrary code.
(CVE-2008-2750)

Gabriel Campana discovered that SCTP routines did not correctly check for large addresses. A local user could exploit this to allocate all available memory, leading to a denial of service. (CVE-2008-2826).

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

  - CVE-2007-6282     Dirk Nehring discovered a vulnerability in the IPsec     code that allows remote users to cause a denial of     service by sending a specially crafted ESP packet.

  - CVE-2008-0598     Tavis Ormandy discovered a vulnerability that allows     local users to access uninitialized kernel memory,     possibly leaking sensitive data. This issue is specific     to the amd64-flavour kernel images.

  - CVE-2008-2729     Andi Kleen discovered an issue where uninitialized     kernel memory was being leaked to userspace during an     exception. This issue may allow local users to gain     access to sensitive data. Only the amd64-flavour Debian     kernel images are affected.

  - CVE-2008-2812     Alan Cox discovered an issue in multiple tty drivers     that allows local users to trigger a denial of service     (NULL pointer dereference) and possibly obtain elevated     privileges.

  - CVE-2008-2826     Gabriel Campana discovered an integer overflow in the     sctp code that can be exploited by local users to cause     a denial of service.

  - CVE-2008-2931     Miklos Szeredi reported a missing privilege check in the     do_change_type() function. This allows local,     unprivileged users to change the properties of mount     points.

  - CVE-2008-3272     Tobias Klein reported a locally exploitable data leak in     the snd_seq_oss_synth_make_info() function. This may     allow local users to gain access to sensitive     information.

  - CVE-2008-3275     Zoltan Sogor discovered a coding error in the VFS that     allows local users to exploit a kernel memory leak     resulting in a denial of service.

The openSUSE 11.0 kernel was updated to 2.6.25.9.

It fixes two security problems: CVE-2008-2372: A resource starvation issue within mmap was fixed, which could have been used by local attackers to hang the machine.

CVE-2008-2826: A integer overflow in SCTP was fixed, which might have been used by remote attackers to crash the machine or potentially execute code.

The update also has lots of other bugfixes that are listed in the RPM changelog.

The openSUSE 10.3 kernel was update to 2.6.22.19. This includes bugs and security fixes.

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-2008-3528: 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-2008-3276: An integer overflow flaw was found in the Linux kernel dccp_setsockopt_change() function. An attacker may leverage this vulnerability to trigger a kernel panic on a victim's machine remotely.

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

CVE-2008-2826: A integer overflow in SCTP was fixed, which might have been used by remote attackers to crash the machine or potentially execute code.

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.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
36653	Mandriva Linux Security Advisory : kernel (MDVSA-2008:167)	Nessus	Mandriva Local Security Checks	2009/4/23	2021/1/6	high
33531	Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : linux, linux-source-2.6.15/20/22 vulnerabilities (USN-625-1)	Nessus	Ubuntu Local Security Checks	2008/7/17	2021/1/19	critical
34032	Debian DSA-1630-1 : linux-2.6 - denial of service/information leak	Nessus	Debian Local Security Checks	2008/8/24	2021/1/4	high
40007	openSUSE Security Update : kernel (kernel-67)	Nessus	SuSE Local Security Checks	2009/7/21	2021/1/14	medium
34457	openSUSE 10 Security Update : kernel (kernel-5700)	Nessus	SuSE Local Security Checks	2008/10/21	2021/1/14	critical

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