Ubuntu alert USN-1646-1 (linux)

From:
    	     
 
John Johansen <john.johansen@canonical.com> 
To:
    	     
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	     
 
[USN-1646-1] Linux kernel vulnerabilities 
Date:
    	     
 
Fri, 30 Nov 2012 00:56:45 -0800
Message-ID:
    	     
 
<50B874CD.9040503@canonical.com>
Archive-link:
    	     
 
Article, Thread
              
==========================================================================
Ubuntu Security Notice USN-1646-1
November 30, 2012

linux vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Brad Spengler discovered a flaw in the Linux kernel's uname system call. An
unprivileged user could exploit this flaw to read kernel stack memory.
(CVE-2012-0957)

Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois
congestion control algorithm. A local attacker could use this to cause a
denial of service. (CVE-2012-4565)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.10:
  linux-image-3.5.0-19-generic    3.5.0-19.30
  linux-image-3.5.0-19-highbank   3.5.0-19.30
  linux-image-3.5.0-19-omap       3.5.0-19.30
  linux-image-3.5.0-19-powerpc-smp  3.5.0-19.30
  linux-image-3.5.0-19-powerpc64-smp  3.5.0-19.30

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1646-1

  CVE-2012-0957, CVE-2012-4565

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.5.0-19.30


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