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Red Hat Enterprise Linux 6 & 7 RHSA-2017-1100-01 Critical DoS

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Calendar Grey April 20, 2017
Scroller Redhat
Important nss and nss-util patch for Red Hat fixes buffer overflow issue. Restart services after patch for safety. Learn more!
An update for nss and nss-util is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7

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.

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 packages provide utilities for use with the Network Security Services (NSS) libraries.
The following packages have been upgraded to a newer upstream version: nss (3.28.4), nss-util (3.28.4).
Security Fix(es):
* An out-of-bounds write flaw was found in the way NSS performed certain Base64-decoding operations. 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-2017-5461)
Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Ronald Crane as the original reporter.

Topics%20covered

Topics Covered

security advisory critical DoS Red Hat Enterprise Linux out-of-bounds nss nss-util

References

https://access.redhat.com/security/cve/CVE-2017-5461 https://access.redhat.com/security/updates/classification#critical

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: nss-3.28.4-1.el6_9.src.rpm nss-util-3.28.4-1.el6_9.src.rpm
i386: nss-3.28.4-1.el6_9.i686.rpm nss-debuginfo-3.28.4-1.el6_9.i686.rpm nss-sysinit-3.28.4-1.el6_9.i686.rpm nss-tools-3.28.4-1.el6_9.i686.rpm nss-util-3.28.4-1.el6_9.i686.rpm nss-util-debuginfo-3.28.4-1.el6_9.i686.rpm
x86_64: nss-3.28.4-1.el6_9.i686.rpm nss-3.28.4-1.el6_9.x86_64.rpm nss-debuginfo-3.28.4-1.el6_9.i686.rpm nss-debuginfo-3.28.4-1.el6_9.x86_64.rpm nss-sysinit-3.28.4-1.el6_9.x86_64.rpm nss-tools-3.28.4-1.el6_9.x86_64.rpm nss-util-3.28.4-1.el6_9.i686.rpm nss-util-3.28.4-1.el6_9.x86_64.rpm nss-util-debuginfo-3.28.4-1.el6_9.i686.rpm nss-util-debuginfo-3.28.4-1.el6_9.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: nss-debuginfo-3.28.4-1.el6_9.i686.rpm nss-devel-3.28.4-1.el6_9.i686.rpm nss-pkcs11-devel-3.28.4-1.el6_9.i686.rpm nss-util-debuginfo-3.28.4-1.el6_9.i686.rpm nss-util-devel-3.28.4-1.el6_9.i686.rpm
x86_64: nss-debuginfo-3.28.4-1.el6_9.i686.rpm nss-debuginfo-3.28.4-1.el6_9.x86_64.rpm nss-devel-3.28.4-1.el6_9.i686.rpm nss-devel-3.28.4-1.el6_9.x86_64.rpm nss-pkcs11-devel-3.28.4-1.el6_9.i686.rpm nss-pkcs11-devel-3.28.4-1.el6_9.x86_64.rpm nss-util-debuginfo-3.28.4-1.el6_9.i686.rpm nss-util-debuginfo-3.28.4-1.el6_9.x86_64.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:1100-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1100
Issue date: 2017-04-20

Topic

An update for nss and nss-util is now available for Red Hat EnterpriseLinux 6 and Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Critical. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory critical DoS Red Hat Enterprise Linux out-of-bounds nss nss-util

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1440080 - CVE-2017-5461 nss: Write beyond bounds caused by bugs in Base64 de/encoding in nssb64d.c and nssb64e.c (MFSA 2017-10)

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