USN-3029-1: NSS vulnerability

Releases

• Ubuntu 16.04 ESM
• Ubuntu 15.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• nss - Network Security Service library

Details

Tyson Smith and Jed Davis discovered that NSS incorrectly handled memory. A
remote attacker could use this issue to cause NSS to crash, resulting in a
denial of service, or possibly execute arbitrary code.

This update refreshes the NSS package to version 3.23 which includes
the latest CA certificate bundle. As a security improvement, this update
also modifies NSS behaviour to reject DH key sizes below 1024 bits,
preventing a possible downgrade attack.

Update instructions

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

Ubuntu 16.04

• libnss3 - 2:3.23-0ubuntu0.16.04.1

Ubuntu 15.10

• libnss3 - 2:3.23-0ubuntu0.15.10.1

Ubuntu 14.04

• libnss3 - 2:3.23-0ubuntu0.14.04.1

Ubuntu 12.04

• libnss3 - 2:3.23-0ubuntu0.12.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use NSS, such as Evolution and Chromium, to make all the necessary
changes.

References

• CVE-2016-2834

Related notices

• USN-2993-1: firefox-locale-bn, firefox-locale-mn, firefox-locale-gd, firefox-locale-lv, firefox-locale-pa, firefox-locale-ro, firefox-locale-nl, firefox-locale-an, firefox-locale-xh, firefox-locale-sv, firefox-locale-zu, firefox-locale-oc, firefox-locale-fi, firefox-locale-hr, firefox-locale-ta, firefox-locale-de, firefox-locale-fr, firefox-locale-uz, firefox-locale-pt, firefox-locale-as, firefox-locale-az, firefox-locale-el, firefox-locale-gn, firefox-locale-kn, firefox-locale-tr, firefox-locale-sr, firefox-locale-pl, firefox-locale-hsb, firefox-mozsymbols, firefox-locale-gu, firefox-locale-or, firefox-locale-hy, firefox-locale-mr, firefox-locale-kk, firefox-locale-cak, firefox-testsuite, firefox-locale-ja, firefox-locale-sw, firefox-locale-en, firefox-locale-vi, firefox-locale-uk, firefox-locale-eu, firefox-dev, firefox-locale-ast, firefox-locale-ar, firefox-locale-is, firefox-locale-ms, firefox-locale-bg, firefox-locale-da, firefox-locale-lt, firefox-locale-ku, firefox-locale-hu, firefox, firefox-locale-zh-hans, firefox-locale-ga, firefox-locale-ka, firefox-locale-nb, firefox-locale-be, firefox-locale-ca, firefox-locale-ru, firefox-locale-fy, firefox-locale-br, firefox-locale-th, firefox-locale-nn, firefox-locale-lg, firefox-locale-bs, firefox-locale-cs, firefox-locale-mai, firefox-locale-et, firefox-locale-eo, firefox-locale-fa, firefox-locale-ml, firefox-locale-si, firefox-locale-sk, firefox-locale-hi, firefox-locale-ko, firefox-locale-gl, firefox-locale-mk, firefox-locale-he, firefox-locale-sq, firefox-locale-sl, firefox-locale-id, firefox-locale-zh-hant, firefox-locale-csb, firefox-locale-it, firefox-locale-te, firefox-locale-es, firefox-locale-km, firefox-locale-nso, firefox-globalmenu, firefox-locale-cy, firefox-locale-af