Ubuntu Security Notice USN-2427-1
27th November, 2014
libksba vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
Libksba could be made to crash or run programs if it opened a specially
crafted file.
Software description
- libksba
– X.509 and CMS support library
Details
Hanno Böck discovered that Libksba incorrectly handled certain S/MIME
messages or ECC based OpenPGP data. An attacker could use this issue to
cause Libksba to crash, resulting in a denial of service, or possibly
execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.10:
-
libksba8
1.3.0-3ubuntu0.14.10.1
- Ubuntu 14.04 LTS:
-
libksba8
1.3.0-3ubuntu0.14.04.1
- Ubuntu 12.04 LTS:
-
libksba8
1.2.0-2ubuntu0.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.