USN-3065-1: Libgcrypt vulnerability

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• libgcrypt11 - LGPL Crypto library
• libgcrypt20 - LGPL Crypto library

Details

Felix Dörre and Vladimir Klebanov discovered that Libgcrypt 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 versions:

Ubuntu 16.04

• libgcrypt20 - 1.6.5-2ubuntu0.2

Ubuntu 14.04

• libgcrypt11 - 1.5.3-2ubuntu4.4

Ubuntu 12.04

• libgcrypt11 - 1.5.0-3ubuntu0.6

In general, a standard system update will make all the necessary changes.

References

• CVE-2016-6313

Related notices

• USN-3064-1: gnupg, gpgv-udeb, gpgv, gnupg-udeb, gnupg-curl