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Red Hat 6.x & 7.x RHSA-2016:0495 Critical: nss-util Buffer Overflow

red hat
Calendar Grey March 23, 2016
Scroller Redhat
Enhanced nss-util packages fix significant security vulnerabilities impacting various Red Hat Enterprise Linux editions.
Updated nss-util packages that fix one security issue are now available for Red Hat Enterprise Linux 6.2, 6.4, and 6.5 Advanced Update Support, and Red Hat Enterprise Linux 6.6 and...

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

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 package provides a set of utilities for NSS and the Softoken module.
A heap-based buffer overflow flaw was found in the way NSS parsed certain ASN.1 structures. An attacker could use this flaw to create a specially crafted certificate which, when parsed by NSS, could cause it to crash, or execute arbitrary code, using the permissions of the user running an application compiled against the NSS library. (CVE-2016-1950)
Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Francis Gabriel as the original reporter.
All nss-util users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. For the update to take effect, all applications linked to the nss and nss-util libraries must be restarted, or the system rebooted.

Topics%20covered

Topics Covered

security advisory security issue buffer overflow red hat software update critical fix nss-util

References

https://access.redhat.com/security/cve/CVE-2016-1950 https://access.redhat.com/security/updates/classification#critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-36/

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.6):
Source: nss-util-3.19.1-3.el6_6.src.rpm
x86_64: nss-util-3.19.1-3.el6_6.i686.rpm nss-util-3.19.1-3.el6_6.x86_64.rpm nss-util-debuginfo-3.19.1-3.el6_6.i686.rpm nss-util-debuginfo-3.19.1-3.el6_6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6):
x86_64: nss-util-debuginfo-3.19.1-3.el6_6.i686.rpm nss-util-debuginfo-3.19.1-3.el6_6.x86_64.rpm nss-util-devel-3.19.1-3.el6_6.i686.rpm nss-util-devel-3.19.1-3.el6_6.x86_64.rpm
Red Hat Enterprise Linux Server AUS (v. 6.2):
Source: nss-util-3.13.1-10.el6_2.src.rpm
x86_64: nss-util-3.13.1-10.el6_2.i686.rpm nss-util-3.13.1-10.el6_2.x86_64.rpm nss-util-debuginfo-3.13.1-10.el6_2.i686.rpm nss-util-debuginfo-3.13.1-10.el6_2.x86_64.rpm nss-util-devel-3.13.1-10.el6_2.i686.rpm nss-util-devel-3.13.1-10.el6_2.x86_64.rpm
Red Hat Enterprise Linux Server AUS (v. 6.4):
Source: nss-util-3.14.3-8.el6_4.src.rpm
x86_64: nss-util-3.14.3-8.el6_4.i686.rpm nss-util-3.14.3-8.el6_4.x86_64.rpm nss-util-debuginfo-3.14.3-8.el6_4.i686.rpm nss-util-debuginfo-3.14.3-8.el6_4.x86_64.rpm nss-util-devel-3.14.3-8.el6_4.i686.rpm nss-util-devel-3.14.3-8.el6_4.x86_64.rpm
Red Hat Enterprise Linux Server AUS (v. 6.5):
Source: nss-util-3.16.1-4.el6_5.src.rpm
x86_64: nss-util-3.16.1-4.el6_5.i686.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:0495-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:0495.html
Issue date: 2016-03-23

Topic

Updated nss-util packages that fix one security issue are now available forRed Hat Enterprise Linux 6.2, 6.4, and 6.5 Advanced Update Support, and RedHat Enterprise Linux 6.6 and 7.1 Extended Update Support.Red Hat Product Security has rated this update as having Critical securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory security issue buffer overflow red hat software update critical fix nss-util

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux HPC Node EUS (v. 6.6) - x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) - x86_64

Red Hat Enterprise Linux Server AUS (v. 6.2) - x86_64

Red Hat Enterprise Linux Server AUS (v. 6.4) - x86_64

Red Hat Enterprise Linux Server AUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1310509 - CVE-2016-1950 nss: Heap buffer overflow vulnerability in ASN1 certificate parsing (MFSA 2016-35)

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