Scientific Linux Security Update : kernel on SL3.x i386/x86_64

This script is Copyright (C) 2012-2013 Tenable Network Security, Inc.

Synopsis :

The remote Scientific Linux host is missing one or more security

Description :

CVE-2008-5029 kernel: Unix sockets kernel panic

CVE-2008-5300 kernel: fix soft lockups/OOM issues with unix socket
garbage collector

CVE-2009-1337 kernel: exit_notify: kill the wrong capable(CAP_KILL)

CVE-2009-1385 kernel: e1000_clean_rx_irq() denial of service

CVE-2009-1895 kernel: personality: fix PER_CLEAR_ON_SETID

CVE-2009-2848 kernel: execve: must clear current->clear_child_tid

CVE-2009-3001, CVE-2009-3002 kernel: numerous getname() infoleaks
520300 - kernel: ipv4: make ip_append_data() handle NULL routing table

CVE-2009-3547 kernel: fs: pipe.c null pointer dereference

Security fixes :

- when fput() was called to close a socket, the
__scm_destroy() function in the Linux kernel could make
indirect recursive calls to itself. This
could,potentially, lead to a denial of service issue.
(CVE-2008-5029, Important)

- the sendmsg() function in the Linux kernel did not block
during UNIX socket garbage collection. This could,
potentially, lead to a local denial of service.
(CVE-2008-5300, Important)

- the exit_notify() function in the Linux kernel did not
properly reset the exit signal if a process executed a
set user ID (setuid) application before exiting. This
could allow a local, unprivileged user to elevate their
privileges. (CVE-2009-1337, Important)

- a flaw was found in the Intel PRO/1000 network driver in
the Linux kernel. Frames with sizes near the MTU of an
interface may be split across multiple hardware receive
descriptors. Receipt of such a frame could leak through
a validation check, leading to a corruption of the
length check. A remote attacker could use this flaw to
send a specially-crafted packet that would cause a
denial of service or code execution. (CVE-2009-1385,

- the ADDR_COMPAT_LAYOUT and MMAP_PAGE_ZERO flags were not
cleared when a setuid or setgid program was executed. A
local, unprivileged user could use this flaw to bypass
the mmap_min_addr protection mechanism and perform a
NULL pointer dereference attack, or bypass the Address
Space Layout Randomization (ASLR) security feature.
(CVE-2009-1895, Important)

- it was discovered that, when executing a new process,
the clear_child_tid pointer in the Linux kernel is not
cleared. If this pointer points to a writable portion of
the memory of the new program, the kernel could corrupt
four bytes of memory, possibly leading to a local denial
of service or privilege escalation. (CVE-2009-2848,

- missing initialization flaws were found in getname()
implementations in the IrDA sockets, AppleTalk DDP
protocol, NET/ROM protocol, and ROSE protocol
implementations in the Linux kernel. Certain data
structures in these getname() implementations were not
initialized properly before being copied to user-space.
These flaws could lead to an information leak.
(CVE-2009-3002, Important)

- a NULL pointer dereference flaw was found in each of the
following functions in the Linux kernel:
pipe_read_open(), pipe_write_open(), and
pipe_rdwr_open(). When the mutex lock is not held, the
i_pipe pointer could be released by other processes
before it is used to update the pipe's reader and writer
counters. This could lead to a local denial of service
or privilege escalation. (CVE-2009-3547, Important)

Bug fixes :

- this update adds the mmap_min_addr tunable and
restriction checks to help prevent unprivileged users
from creating new memory mappings below the minimum
address. This can help prevent the exploitation of NULL
pointer dereference bugs. Note that mmap_min_addr is set
to zero (disabled) by default for backwards
compatibility. (BZ#512642)

- a bridge reference count problem in IPv6 has been fixed.

- enforce null-termination of user-supplied arguments to
setsockopt(). (BZ#505514)

- the gcc flag '-fno-delete-null-pointer-checks' was added
to the kernel build options. This prevents gcc from
optimizing out NULL pointer checks after the first use
of a pointer. NULL pointer bugs are often exploited by
attackers. Keeping these checks is a safety measure.

- a check has been added to the IPv4 code to make sure
that rt is not NULL, to help prevent future bugs in
functions that call ip_append_data() from being
exploitable. (BZ#520300)

The system must be rebooted for this update to take effect.

See also :

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
Public Exploit Available : true

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 60688 ()

Bugtraq ID:

CVE ID: CVE-2008-5029