Scientific Linux Security Update : kernel on SL6.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

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

This update fixes the following security issues :

- Flaws in the AGPGART driver implementation when handling
certain IOCTL commands could allow a local user to cause
a denial of service or escalate their privileges.
(CVE-2011-1745, CVE-2011-2022, Important)

- An integer overflow flaw in agp_allocate_memory() could
allow a local user to cause a denial of service or
escalate their privileges. (CVE-2011-1746, Important)

- A race condition flaw was found in the Linux kernel's
eCryptfs implementation. A local attacker could use the
mount.ecryptfs_private utility to mount (and then
access) a directory they would otherwise not have access
to. Note: To correct this issue, a previous
ecryptfs-utils update, which provides the user-space
part of the fix, must also be installed. (CVE-2011-1833,
Moderate)

- A denial of service flaw was found in the way the
taskstats subsystem handled the registration of process
exit handlers. A local, unprivileged user could register
an unlimited amount of these handlers, leading to
excessive CPU time and memory use. (CVE-2011-2484,
Moderate)

- A flaw was found in the way mapping expansions were
handled. A local, unprivileged user could use this flaw
to cause a wrapping condition, triggering a denial of
service. (CVE-2011-2496, Moderate)

- A flaw was found in the Linux kernel's Performance
Events implementation. It could falsely lead the NMI
(Non-Maskable Interrupt) Watchdog to detect a lockup and
panic the system. A local, unprivileged user could use
this flaw to cause a denial of service (kernel panic)
using the perf tool. (CVE-2011-2521, Moderate)

- A flaw in skb_gro_header_slow() in the Linux kernel
could lead to GRO (Generic Receive Offload) fields being
left in an inconsistent state. An attacker on the local
network could use this flaw to trigger a denial of
service. GRO is enabled by default in all network
drivers that support it. (CVE-2011-2723, Moderate)

- A flaw was found in the way the Linux kernel's
Performance Events implementation handled
PERF_COUNT_SW_CPU_CLOCK counter overflow. A local,
unprivileged user could use this flaw to cause a denial
of service. (CVE-2011-2918, Moderate)

- A flaw was found in the Linux kernel's Trusted Platform
Module (TPM) implementation. A local, unprivileged user
could use this flaw to leak information to user-space.
(CVE-2011-1160, Low)

- Flaws were found in the tpacket_rcv() and
packet_recvmsg() functions in the Linux kernel. A local,
unprivileged user could use these flaws to leak
information to user-space. (CVE-2011-2898, Low)

This update also fixes various bugs and adds one enhancement.
Documentation for these changes will be available shortly from the
Technical Notes document linked to in the References section.

Users should upgrade to these updated packages, which contain
backported patches to correct these issues, and fix the bugs and add
the enhancement noted in the Technical Notes. The system must be
rebooted for this update to take effect.

See also :

http://www.nessus.org/u?f16ef6e2

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61148 ()

Bugtraq ID:

CVE ID: CVE-2011-1160
CVE-2011-1745
CVE-2011-1746
CVE-2011-1833
CVE-2011-2484
CVE-2011-2496
CVE-2011-2521
CVE-2011-2723
CVE-2011-2898
CVE-2011-2918