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Alerts This Week
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Red Hat Enterprise Linux 5 RHSA-2017:1101-01 Critical: NSS Out-of-Bounds

red hat
Calendar Grey April 20, 2017
Scroller Redhat
Urgent advisory for Red Hat Enterprise Linux regarding NSS vulnerabilities stemming from an out-of-bounds write issue. Immediate application recommended.
An update for nss is now available for Red Hat Enterprise Linux 5 Extended Lifecycle Support

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.
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 red hat critical fix out-of-bounds nss network security services

References

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

Package List

Red Hat Enterprise Linux Server (v. 5 ELS):
Source: nss-3.21.4-1.el5_11.src.rpm
i386: nss-3.21.4-1.el5_11.i386.rpm nss-debuginfo-3.21.4-1.el5_11.i386.rpm nss-devel-3.21.4-1.el5_11.i386.rpm nss-pkcs11-devel-3.21.4-1.el5_11.i386.rpm nss-tools-3.21.4-1.el5_11.i386.rpm
s390x: nss-3.21.4-1.el5_11.s390.rpm nss-3.21.4-1.el5_11.s390x.rpm nss-debuginfo-3.21.4-1.el5_11.s390.rpm nss-debuginfo-3.21.4-1.el5_11.s390x.rpm nss-devel-3.21.4-1.el5_11.s390.rpm nss-devel-3.21.4-1.el5_11.s390x.rpm nss-pkcs11-devel-3.21.4-1.el5_11.s390.rpm nss-pkcs11-devel-3.21.4-1.el5_11.s390x.rpm nss-tools-3.21.4-1.el5_11.s390x.rpm
x86_64: nss-3.21.4-1.el5_11.i386.rpm nss-3.21.4-1.el5_11.x86_64.rpm nss-debuginfo-3.21.4-1.el5_11.i386.rpm nss-debuginfo-3.21.4-1.el5_11.x86_64.rpm nss-devel-3.21.4-1.el5_11.i386.rpm nss-devel-3.21.4-1.el5_11.x86_64.rpm nss-pkcs11-devel-3.21.4-1.el5_11.i386.rpm nss-pkcs11-devel-3.21.4-1.el5_11.x86_64.rpm nss-tools-3.21.4-1.el5_11.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:1101-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1101
Issue date: 2017-04-20

Topic

An update for nss is now available for Red Hat Enterprise Linux 5 ExtendedLifecycle Support.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 red hat critical fix out-of-bounds nss network security services

Relevant Releases Architectures

Red Hat Enterprise Linux Server (v. 5 ELS) - i386, s390x, 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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