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Ubuntu Security Notice USN-1634-1

Ubuntu Security Notice USN-1634-1
Posted Nov 20, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1634-1 - 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. 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. Various other issues were also addressed.

tags | advisory, local, python
systems | linux, ubuntu
advisories | CVE-2012-4571, CVE-2012-4571
MD5 | b217ada3ab3a4f3bb1f6a95cd70cd4f1

Ubuntu Security Notice USN-1634-1

Change Mirror Download
============================================================================
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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