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[USN-1280-1] Linux (OMAP4) vulnerabilities

Posted on 24 November 2011
Ubuntu Security

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Ubuntu Security Notice USN-1280-1
November 24, 2011

linux-ti-omap4 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.10

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-ti-omap4: Linux kernel for OMAP4

Details:

It was discovered that CIFS incorrectly handled authentication. When a us=
er
had a CIFS share mounted that required authentication, a local user could=

mount the same share without knowing the correct password. (CVE-2011-1585=
)

Robert Swiecki discovered that mapping extensions were incorrectly handle=
d.
A local attacker could exploit this to crash the system, leading to a
denial of service. (CVE-2011-2496)

Update instructions:

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

Ubuntu 10.10:
linux-image-2.6.35-903-omap4 2.6.35-903.27

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

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic=
,
linux-server, linux-powerpc), a standard system upgrade will automaticall=
y
perform this as well.

References:
http://www.ubuntu.com/usn/usn-1280-1
CVE-2011-1585, CVE-2011-2496

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/2.6.35-903.27



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