USN-2897-1: Nettle vulnerabilities

Ubuntu Security Notice USN-2897-1

15th February, 2016

nettle vulnerabilities

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

• Ubuntu 15.10
• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Nettle.

Software description

• nettle
  – low level cryptographic library (public-key cryptos)

Details

Hanno Böck discovered that Nettle incorrectly handled carry propagation in
the NIST P-256 elliptic curve. (CVE-2015-8803)

Hanno Böck discovered that Nettle incorrectly handled carry propagation in
the NIST P-384 elliptic curve. (CVE-2015-8804)

Niels Moeller discovered that Nettle incorrectly handled carry propagation
in the NIST P-256 elliptic curve. (CVE-2015-8805)

Update instructions

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

Ubuntu 15.10:

libnettle6

3.1.1-4ubuntu0.1

Ubuntu 14.04 LTS:

libnettle4

2.7.1-1ubuntu0.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2015-8803,

CVE-2015-8804,

CVE-2015-8805

Source: ubuntu-usn