Ubuntu 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : libgcrypt11, libgcrypt20 vulnerabilities (USN-3347-1)

Ubuntu Security Notice (C) 2017 Canonical, Inc. / NASL script (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

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).

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.

Solution :

Update the affected libgcrypt11 and / or libgcrypt20 packages.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N)
CVSS Temporal Score : 3.2
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 101231 ()

Bugtraq ID:

CVE ID: CVE-2017-7526
CVE-2017-9526

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