SuSE: 2011-004: Linux kernel Security Update
Summary
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SUSE Security Announcement
Package: kernel
Announcement ID: SUSE-SA:2011:004
Date: Fri, 14 Jan 2011 13:00:00 +0000
Affected Products: SUSE Linux Enterprise High Availability Extension 11 SP1
SUSE Linux Enterprise Desktop 11 SP1
SUSE Linux Enterprise Server 11 SP1
Vulnerability Type: local privilege escalation
CVSS v2 Base Score: 7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)
SUSE Default Package: yes
Cross-References: CVE-2010-3437, CVE-2010-3861, CVE-2010-3874
CVE-2010-3881, CVE-2010-4072, CVE-2010-4073
CVE-2010-4082, CVE-2010-4083, CVE-2010-4157
CVE-2010-4158, CVE-2010-4160, CVE-2010-4162
CVE-2010-4163, CVE-2010-4164, CVE-2010-4165
CVE-2010-4169, CVE-2010-4175, CVE-2010-4258
Content of This Advisory:
1) Security Vulnerability Resolved:
Linux kernel security problems
Problem Description
2) Solution or Work-Around
3) Special Instructions and Notes
4) Package Location and Checksums
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
See SUSE Security Summary Report.
6) Authenticity Verification and Additional Information
______________________________________________________________________________
1) Problem Description and Brief Discussion
The SUSE Linux Enterprise 11 Service Pack 1 kernel was updated to
2.6.32.27 and fixes various bugs and security issues.
Following security issues were fixed:
CVE-2010-4258: A local attacker could use a Oops (kernel crash) caused
by other flaws to write a 0 byte to a attacker controlled address
in the kernel. This could lead to privilege escalation together with
other issues.
CVE-2010-4160: An overflow in sendto() and recvfrom() routines was
fixed that could be used by local attackers to potentially crash the
kernel using some socket families like L2TP.
CVE-2010-4157: A 32bit vs 64bit integer mismatch in gdth_ioctl_alloc
could lead to memory corruption in the GDTH driver.
CVE-2010-4165: The do_tcp_setsockopt function in net/ipv4/tcp.c
in the Linux kernel did not properly restrict TCP_MAXSEG (aka MSS)
values, which allowed local users to cause a denial of service (OOPS)
via a setsockopt call that specifies a small value, leading to a
divide-by-zero error or incorrect use of a signed integer.
CVE-2010-4164: A remote (or local) attacker communicating over X.25
could cause a kernel panic by attempting to negotiate malformed
facilities.
CVE-2010-4175: A local attacker could cause memory overruns in the
RDS protocol stack, potentially crashing the kernel. So far it is
considered not to be exploitable.
CVE-2010-4169: Use-after-free vulnerability in mm/mprotect.c in the
Linux kernel allowed local users to cause a denial of service via
vectors involving an mprotect system call.
CVE-2010-3874: A minor heap overflow in the CAN network module
was fixed. Due to nature of the memory allocator it is likely not
exploitable.
CVE-2010-4158: A memory information leak in Berkeley packet filter
rules allowed local attackers to read uninitialized memory of the
kernel stack.
CVE-2010-4162: A local denial of service in the blockdevice layer
was fixed.
CVE-2010-4163: By submitting certain I/O requests with 0 length,
a local user could have caused a kernel panic.
CVE-2010-3861: The ethtool_get_rxnfc function in net/core/ethtool.c
in the Linux kernel did not initialize a certain block of heap memory,
which allowed local users to obtain potentially sensitive information
via an ETHTOOL_GRXCLSRLALL ethtool command with a large info.rule_cnt
value.
CVE-2010-3881: arch/x86/kvm/x86.c in the Linux kernel did not
initialize certain structure members, which allowed local users to
obtain potentially sensitive information from kernel stack memory
via read operations on the /dev/kvm device.
CVE-2010-3437: A range checking overflow in pktcdvd ioctl was fixed.
CVE-2010-4082: The viafb_ioctl_get_viafb_info function in
drivers/video/via/ioctl.c in the Linux kernel did not properly
initialize a certain structure member, which allowed local users to
obtain potentially sensitive information from kernel stack memory
via a VIAFB_GET_INFO ioctl call.
CVE-2010-4073: The ipc subsystem in the Linux kernel did not
initialize certain structures, which allowed local users to obtain
potentially sensitive information from kernel stack memory via
vectors related to the (1) compat_sys_semctl, (2) compat_sys_msgctl,
and (3) compat_sys_shmctl functions in ipc/compat.c; and the (4)
compat_sys_mq_open and (5) compat_sys_mq_getsetattr functions in
ipc/compat_mq.c.
CVE-2010-4072: The copy_shmid_to_user function in ipc/shm.c in the
Linux kernel did not initialize a certain structure, which allowed
local users to obtain potentially sensitive information from kernel
stack memory via vectors related to the shmctl system call and the
"old shm interface."
CVE-2010-4083: The copy_semid_to_user function in ipc/sem.c in the
Linux kernel did not initialize a certain structure, which allowed
local users to obtain potentially sensitive information from kernel
stack memory via a (1) IPC_INFO, (2) SEM_INFO, (3) IPC_STAT, or (4)
SEM_STAT command in a semctl system call.
2) Solution or Work-Around
There is no known workaround, please install the update packages.
3) Special Instructions and Notes
Please reboot the machine after installing the update.
4) Package Location and Checksums
The preferred method for installing security updates is to use the YaST
"Online Update" module or the "zypper" commandline tool. The package and
patch management stack will detect which updates are required and
automatically perform the necessary steps to verify and install them.
Alternatively, download the update packages for your distribution manually
and verify their integrity by the methods listed in Section 6 of this
announcement. Then install the packages using the command
rpm -Fhv
References
