Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.04 : gnupg, libgcrypt11 vulnerability (USN-1923-1)

Ubuntu Security Notice (C) 2013-2016 Canonical, Inc. / NASL script (C) 2013-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

Yuval Yarom and Katrina Falkner discovered a timing-based information
leak, known as Flush+Reload, that could be used to trace execution in
programs. GnuPG and Libgcrypt followed different execution paths based
on key-related data, which could be used to expose the contents of
private keys.

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 gnupg and / or libgcrypt11 packages.

Risk factor :

Low / CVSS Base Score : 1.9
(CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N)
CVSS Temporal Score : 1.6
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 69175 ()

Bugtraq ID: 61464

CVE ID: CVE-2013-4242

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