Ubuntu 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : libgcrypt11, libgcrypt20 vulnerabilities (USN-3347-1)
Medium Nessus Plugin ID 101231
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionDaniel 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).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected libgcrypt11 and / or libgcrypt20 packages.