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[USN-1646-1] Linux kernel vulnerabilities

Posted on 30 November 2012
Ubuntu Security

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Ubuntu Security Notice USN-1646-1
November 30, 2012

linux vulnerabilities
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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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