1. Ubuntu Security Notices
  2. USN-3065-1

USN-3065-1: Libgcrypt vulnerability

Publication date

18 August 2016

Overview

Libgcrypt incorrectly generated random numbers.

Releases

Packages

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.

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

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

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
16.04 xenial libgcrypt20 –  1.6.5-2ubuntu0.2
14.04 trusty libgcrypt11 –  1.5.3-2ubuntu4.4
12.04 precise libgcrypt11 –  1.5.0-3ubuntu0.6

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References

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