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Ubuntu Security Notice USN-3733-2

Ubuntu Security Notice USN-3733-2
Posted Aug 16, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3733-2 - USN-3733-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 12.04 ESM. Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal, and Yuval Yarom discovered that GnuPG is vulnerable to a cache side- channel attack. A local attacker could use this attack to recover RSA private keys. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2017-7526
MD5 | fe19ad438a707deec7536790c1f1f042

Ubuntu Security Notice USN-3733-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3733-2
August 15, 2018

gnupg vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

GnuPG could be made to expose sensitive information.

Software Description:
- gnupg: GNU privacy guard - a free PGP replacement

Details:

USN-3733-1 fixed a vulnerability in GnuPG. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot
Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal,
and Yuval Yarom discovered that GnuPG is vulnerable to a cache side-
channel attack. A local attacker could use this attack to recover RSA
private keys.

Update instructions:

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

Ubuntu 12.04 ESM:
gnupg 1.4.11-3ubuntu2.12
gnupg-curl 1.4.11-3ubuntu2.12
gpgv 1.4.11-3ubuntu2.12

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

References:
https://usn.ubuntu.com/usn/usn-3733-2
https://usn.ubuntu.com/usn/usn-3733-1
CVE-2017-7526

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