Ubuntu Security Notice USN-2339-2
3rd September, 2014
libgcrypt11 vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
Summary
Libgcrypt could expose sensitive information when performing decryption.
Software description
- libgcrypt11
– LGPL Crypto library
Details
Daniel Genkin, Adi Shamir, and Eran Tromer discovered that Libgcrypt was
susceptible to an adaptive chosen ciphertext attack via physical side
channels. A local attacker could use this attack to possibly recover
private keys.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.04 LTS:
-
libgcrypt11
1.5.3-2ubuntu4.1
- Ubuntu 12.04 LTS:
-
libgcrypt11
1.5.0-3ubuntu0.3
- Ubuntu 10.04 LTS:
-
libgcrypt11
1.4.4-5ubuntu2.3
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.