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Ubuntu: Security update for Python Keyring

Dwayne Litzenberger discovered that Python Keyring’s CryptedFileKeyring file format used weak cryptography. A local attacker may use this issue to brute-force CryptedFileKeyring keyring files. It was discovered that Python Keyring created keyring files with insecure permissions. A local attacker could use this issue to access keyring files belonging to other users.

Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1634-1
November 20, 2012

python-keyring vulnerabilities
==========================================================================

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

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10

Summary:

Several security issues were fixed in Python Keyring.

Software Description:
- python-keyring: store and access your passwords safely

Details:

Dwayne Litzenberger discovered that Python Keyring's CryptedFileKeyring
file format used weak cryptography. A local attacker may use this issue to
brute-force CryptedFileKeyring keyring files. This issue only affected
Ubuntu 11.10 and Ubuntu 12.04 LTS. (CVE-2012-4571)

It was discovered that Python Keyring created keyring files with insecure
permissions. A local attacker could use this issue to access keyring files
belonging to other users.

Update instructions:

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

Ubuntu 12.10:
 python-keyring                  0.9.2-1ubuntu0.2
 python3-keyring                 0.9.2-1ubuntu0.2

Ubuntu 12.04 LTS:
 python-keyring                  0.9.2-0ubuntu0.12.04.2
 python3-keyring                 0.9.2-0ubuntu0.12.04.2

Ubuntu 11.10:
 python-keyring                  0.9.2-0ubuntu0.11.10.2

In general, a standard system update will make all the necessary changes.
This update uses a new upstream release, which includes additional bug
fixes, and will migrate existing keyring files to the new format upon first
use.

References:
 http://www.ubuntu.com/usn/usn-1634-1
 CVE-2012-4571, https://launchpad.net/bugs/1004845

Package Information:
 https://launchpad.net/ubuntu/+source/python-keyring/0.9.2-1ubuntu0.2
 https://launchpad.net/ubuntu/+source/python-keyring/0.9.2-0ubuntu0.12.04.2
 https://launchpad.net/ubuntu/+source/python-keyring/0.9.2-0ubuntu0.11.10.2
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