[USN-1646-1] Linux kernel vulnerabilities

John Johansen john.johansen at canonical.com
Fri Nov 30 08:56:45 UTC 2012

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


Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel


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.

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.

  CVE-2012-0957, CVE-2012-4565

Package Information:

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