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 :

This update fixes the following security issues :

- It was found that a previous update did not correctly
fix the CVE-2011-4131 issue. A malicious Network File
System version 4 (NFSv4) server could return a crafted
reply to a GETACL request, causing a denial of service
on the client. (CVE-2012-2375, Moderate)

- A divide-by-zero flaw was found in the TCP Illinois
congestion control algorithm implementation in the Linux
kernel. If the TCP Illinois congestion control algorithm
were in use (the sysctl net.ipv4.tcp_congestion_control
variable set to 'illinois'), a local, unprivileged user
could trigger this flaw and cause a denial of service.
(CVE-2012-4565, Moderate)

- A NULL pointer dereference flaw was found in the way a
new node's hot added memory was propagated to other
nodes' zonelists. By utilizing this newly added memory
from one of the remaining nodes, a local, unprivileged
user could use this flaw to cause a denial of service.
(CVE-2012-5517, Moderate)

- It was found that the initial release of Scientific
Linux 6 did not correctly fix the CVE-2009-4307 issue, a
divide-by-zero flaw in the ext4 file system code. A
local, unprivileged user with the ability to mount an
ext4 file system could use this flaw to cause a denial
of service. (CVE-2012-2100, Low)

- A flaw was found in the way the Linux kernel's IPv6
implementation handled overlapping, fragmented IPv6
packets. A remote attacker could potentially use this
flaw to bypass protection mechanisms (such as a firewall
or intrusion detection system (IDS)) when sending
network packets to a target system. (CVE-2012-4444, Low)

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

See also :

http://www.nessus.org/u?62a6b25f

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.1
(CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 63313 ()

Bugtraq ID:

CVE ID: CVE-2009-4307
CVE-2011-4131
CVE-2012-2100
CVE-2012-2375
CVE-2012-4444
CVE-2012-4565
CVE-2012-5517