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Ubuntu Security Notice USN-2482-1
January 23, 2015

elfutils vulnerability

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

• Ubuntu 14.10
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS
• Ubuntu 10.04 LTS

Summary:

elfutils could be made to overwrite files in the root directory if it received
a specially crafted file.

Software Description:

• elfutils: collection of utilities to handle ELF objects

Details:

Alexander Cherepanov discovered that libelf1 incorrectly handled certain
filesystem paths while extracting ar archives. An attacker could use this flaw
to perform a directory traversal attack on the root directory if the process
extracting the ar archive has write access to the root directory.

Update instructions:

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

Ubuntu 14.10:
libelf1 0.160-0ubuntu2.1

Ubuntu 14.04 LTS:
libelf1 0.158-0ubuntu5.2

Ubuntu 12.04 LTS:
libelf1 0.152-1ubuntu3.1

Ubuntu 10.04 LTS:
libelf1 0.143-1ubuntu0.1

After a standard system update you need to restart applications using libelf1
to make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-2482-1
CVE-2014-9447

Package Information:
https://launchpad.net/ubuntu/+source/elfutils/0.160-0ubuntu2.1
https://launchpad.net/ubuntu/+source/elfutils/0.158-0ubuntu5.2
https://launchpad.net/ubuntu/+source/elfutils/0.152-1ubuntu3.1
https://launchpad.net/ubuntu/+source/elfutils/0.143-1ubuntu0.1

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