Ubuntu Security Notice USN-3064-1
18th August, 2016
gnupg vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
GnuPG incorrectly generated random numbers.
Software description
- gnupg
– GNU privacy guard – a free PGP replacement
Details
Felix Dörre and Vladimir Klebanov discovered that GnuPG incorrectly handled
mixing functions in the random number generator. An attacker able to obtain
4640 bits from the RNG can trivially predict the next 160 bits of output.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 16.04 LTS:
-
gnupg
1.4.20-1ubuntu3.1
- Ubuntu 14.04 LTS:
-
gnupg
1.4.16-1ubuntu2.4
- Ubuntu 12.04 LTS:
-
gnupg
1.4.11-3ubuntu2.10
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.