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Ubuntu Security Notice USN-3347-2

Ubuntu Security Notice USN-3347-2
Posted Jul 17, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3347-2 - USN-3347-1 fixed a vulnerability in Libgcrypt. This update provides the corresponding update for Ubuntu 12.04 ESM. A Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot A Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal, and A Yuval Yarom discovered that Libgcrypt was susceptible to an attack via A side channels. A local attacker could use this attack to recover RSA A private keys. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2017-7526
MD5 | fd750c8da9a13d230bb2725580662c1d

Ubuntu Security Notice USN-3347-2

Change Mirror Download
=======================================================================
===
Ubuntu Security Notice USN-3347-2
July 17, 2017

libgcrypt11 vulnerability
=======================================================================
===

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Libgcrypt.

Software Description:
- libgcrypt11: LGPL Crypto library

Details:

USN-3347-1 fixed a vulnerability in Libgcrypt. This update provides the
corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

A Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot
A Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal,
and
A Yuval Yarom discovered that Libgcrypt was susceptible to an attack via
A side channels. A local attacker could use this attack to recover RSA
A private keys. (CVE-2017-7526)

Update instructions:

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

Ubuntu 12.04 ESM:
A libgcrypt11A A A A A A A A A A A A A A A A A A A A A 1.5.0-3ubuntu0.7

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

References:
A https://www.ubuntu.com/usn/usn-3347-2
A https://www.ubuntu.com/usn/usn-3347-1
A CVE-2017-7526

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