Advisory Published

USN-3347-1: Libgcrypt vulnerabilities

First published: Mon Jul 03 2017(Updated: )

Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal, and Yuval Yarom discovered that Libgcrypt was susceptible to an attack via side channels. A local attacker could use this attack to recover RSA private keys. (CVE-2017-7526) It was discovered that Libgcrypt was susceptible to an attack via side channels. A local attacker could use this attack to possibly recover EdDSA private keys. This issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-9526)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libgcrypt20<1.7.6-1ubuntu0.1
1.7.6-1ubuntu0.1
=17.04
All of
ubuntu/libgcrypt20<1.7.2-2ubuntu1.1
1.7.2-2ubuntu1.1
=16.10
All of
ubuntu/libgcrypt20<1.6.5-2ubuntu0.3
1.6.5-2ubuntu0.3
=16.04
All of
ubuntu/libgcrypt11<1.5.3-2ubuntu4.5
1.5.3-2ubuntu4.5
=14.04

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