Moderate CentOS nss Security Update


nss-3.19.1-1.el5_11.i386.rpm, nss-3.19.1-1.el5_11.src.rpm, nss-3.19.1-1.el5_11.x86_64.rpm, nss-devel-3.19.1-1.el5_11.i386.rpm, nss-devel-3.19.1-1.el5_11.x86_64.rpm, nss-pkcs11-devel-3.19.1-1.el5_11.i386.rpm, nss-pkcs11-devel-3.19.1-1.el5_11.x86_64.rpm, nss-tools-3.19.1-1.el5_11.i386.rpm, nss-tools-3.19.1-1.el5_11.x86_64.rpm
CVE-2015-2721, CVE-2015-2730,
2017-07-27 19:09
CVE-2015-2730 iceweasel
CVE-2015-2730 nss
CVE-2015-2721 iceweasel
CVE-2015-2721 icedove
CVE-2015-2721 nss
2017-04-01 19:09
2017-01-05 20:13


Updated nss packages that fix two security issues, several bugs, and add
various enhancements are now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Network Security Services (NSS) is a set of libraries designed to support
cross-platform development of security-enabled client and server

It was found that NSS permitted skipping of the ServerKeyExchange packet
during a handshake involving ECDHE (Elliptic Curve Diffie-Hellman key
Exchange). A remote attacker could use this flaw to bypass the
forward-secrecy of a TLS/SSL connection. (CVE-2015-2721)

A flaw was found in the way NSS verified certain ECDSA (Elliptic Curve
Digital Signature Algorithm) signatures. Under certain conditions, an
attacker could use this flaw to conduct signature forgery attacks.

Red Hat would like to thank the Mozilla project for reporting this issue.
Upstream acknowledges Karthikeyan Bhargavan as the original reporter of
CVE-2015-2721, and Watson Ladd as the original reporter of CVE-2015-2730.

The nss packages have been upgraded to upstream version 3.19.1, which
provides a number of bug fixes and enhancements over the previous version.

All nss users are advised to upgrade to these updated packages, which
correct these issues.
Please see

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Affected package information

Release Package Patched in
5 nss nss-3.19.1-1.el5_11.i386.rpm
nss nss-3.19.1-1.el5_11.src.rpm
nss nss-3.19.1-1.el5_11.x86_64.rpm
nss-devel nss-devel-3.19.1-1.el5_11.i386.rpm
nss-devel nss-devel-3.19.1-1.el5_11.x86_64.rpm
nss-pkcs11-devel nss-pkcs11-devel-3.19.1-1.el5_11.i386.rpm
nss-pkcs11-devel nss-pkcs11-devel-3.19.1-1.el5_11.x86_64.rpm
nss-tools nss-tools-3.19.1-1.el5_11.i386.rpm
nss-tools nss-tools-3.19.1-1.el5_11.x86_64.rpm