Synopsis
Moderate: nss and nss-util security update
Type/Severity
Security Advisory: Moderate
Topic
An update for nss and nss-util is now available for Red Hat Enterprise Linux 5,
Red Hat Enterprise Linux 6, and Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of
Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a
detailed severity rating, is available for each vulnerability from the CVE
link(s) in the References section.
Description
Network Security Services (NSS) is a set of libraries designed to support the
cross-platform development of security-enabled client and server applications.
The nss-util packages provide utilities for use with the Network Security
Services (NSS) libraries.
The following packages have been upgraded to a newer upstream version: nss
(3.21.3), nss-util (3.21.3).
Security Fix(es):
- Multiple buffer handling flaws were found in the way NSS handled cryptographic
data from the network. A remote attacker could use these flaws to crash an
application using NSS or, possibly, execute arbitrary code with the permission
of the user running the application. (CVE-2016-2834)
- A NULL pointer dereference flaw was found in the way NSS handled invalid
Diffie-Hellman keys. A remote client could use this flaw to crash a TLS/SSL
server using NSS. (CVE-2016-5285)
- It was found that Diffie Hellman Client key exchange handling in NSS was
vulnerable to small subgroup confinement attack. An attacker could use this flaw
to recover private keys by confining the client DH key to small subgroup of the
desired group. (CVE-2016-8635)
Red Hat would like to thank the Mozilla project for reporting CVE-2016-2834. The
CVE-2016-8635 issue was discovered by Hubert Kario (Red Hat). Upstream
acknowledges Tyson Smith and Jed Davis as the original reporter of
CVE-2016-2834.
Solution
For details on how to apply this update, which includes the changes described in
this advisory, refer to:
https://access.redhat.com/articles/11258
After installing this update, applications using NSS (for example, Firefox) must
be restarted for this update to take effect.
Affected Products
-
Red Hat Enterprise Linux Server 7 x86_64
-
Red Hat Enterprise Linux Server 6 x86_64
-
Red Hat Enterprise Linux Server 6 i386
-
Red Hat Enterprise Linux Server 5 x86_64
-
Red Hat Enterprise Linux Server 5 ia64
-
Red Hat Enterprise Linux Server 5 i386
-
Red Hat Enterprise Linux Server - Extended Update Support 7.6 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.5 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.4 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.3 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.6 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.4 x86_64
-
Red Hat Enterprise Linux Workstation 7 x86_64
-
Red Hat Enterprise Linux Workstation 6 x86_64
-
Red Hat Enterprise Linux Workstation 6 i386
-
Red Hat Enterprise Linux Workstation 5 x86_64
-
Red Hat Enterprise Linux Workstation 5 i386
-
Red Hat Enterprise Linux Desktop 7 x86_64
-
Red Hat Enterprise Linux Desktop 6 x86_64
-
Red Hat Enterprise Linux Desktop 6 i386
-
Red Hat Enterprise Linux Desktop 5 x86_64
-
Red Hat Enterprise Linux Desktop 5 i386
-
Red Hat Enterprise Linux for IBM z Systems 7 s390x
-
Red Hat Enterprise Linux for IBM z Systems 6 s390x
-
Red Hat Enterprise Linux for IBM z Systems 5 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
-
Red Hat Enterprise Linux for Power, big endian 7 ppc64
-
Red Hat Enterprise Linux for Power, big endian 6 ppc64
-
Red Hat Enterprise Linux for Power, big endian 5 ppc
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
-
Red Hat Enterprise Linux for Scientific Computing 7 x86_64
-
Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
-
Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
-
Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.3 x86_64
-
Red Hat Enterprise Linux for Power, little endian 7 ppc64le
-
Red Hat Enterprise Linux for Scientific Computing 6 x86_64
-
Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.5 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.4 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
-
Red Hat Enterprise Linux Server - TUS 7.6 x86_64
-
Red Hat Enterprise Linux Server - TUS 7.3 x86_64
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.6 ppc64le
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.4 ppc64le
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.3 ppc64le
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.6 x86_64
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.4 x86_64
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.3 x86_64
Fixes
- BZ - 1347908 - CVE-2016-2834 nss: Multiple security flaws (MFSA 2016-61)
- BZ - 1383883 - CVE-2016-5285 nss: Missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime causes server crash
- BZ - 1391818 - CVE-2016-8635 nss: small-subgroups attack flaw
CVEs
References
Vulmon