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RedHat: RHSA-2016:0685-01 Moderate: NSS Use-After-Free Security Issue

red hat
Calendar Grey April 25, 2016
Dist Redhat Esm H88
New releases for NSS, NSPR, and NSS-softokn have been issued for Red Hat Linux, addressing moderate security vulnerabilities and providing essential bug fixes.
An update for nss, nspr, nss-softokn, and nss-util is now available for 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 NSPR (for example, Firefox) must be restarted for this update to take effect. 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. Netscape Portable Runtime (NSPR) provides platform independence for non-GUI operating system facilities.
The following packages have been upgraded to a newer upstream version: nss (3.21.0), nss-util (3.21.0), nspr (4.11.0). (BZ#1310581, BZ#1303021, BZ#1299872)
Security Fix(es):
* A use-after-free flaw was found in the way NSS handled DHE (Diffie–Hellman key exchange) and ECDHE (Elliptic Curve Diffie-Hellman key exchange) handshake messages. A remote attacker could send a specially crafted handshake message that, when parsed by an application linked against NSS, would cause that application to crash or, under certain special conditions, execute arbitrary code using the permissions of the user running the application. (CVE-2016-1978)
* A use-after-free flaw was found in the way NSS processed certain DER (Distinguished Encoding Rules) encoded cryptographic keys. An attacker could use this flaw to create a specially crafted DER encoded certificate which, when parsed by an application compiled against the NSS library, could cause that application to crash, or execute arbitrary code using the permissions of the user running the application. (CVE-2016-1979)
Red Hat would like to thank the Mozilla project for reporting these issues. Upstream acknowledges Eric Rescorla as the original reporter of CVE-2016-1978; and Tim Taubert as the original reporter of CVE-2016-1979.
Bug Fix(es):
* The nss-softokn package has been updated to be compatible with NSS 3.21. (BZ#1326221)

Topics%20covered

Topics Covered

security advisory moderate software update cryptography NSS RedHat use-after-free

References

https://access.redhat.com/security/cve/CVE-2016-1978 https://access.redhat.com/security/cve/CVE-2016-1979 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: nspr-4.11.0-1.el7_2.src.rpm nss-3.21.0-9.el7_2.src.rpm nss-softokn-3.16.2.3-14.2.el7_2.src.rpm nss-util-3.21.0-2.2.el7_2.src.rpm
x86_64: nspr-4.11.0-1.el7_2.i686.rpm nspr-4.11.0-1.el7_2.x86_64.rpm nspr-debuginfo-4.11.0-1.el7_2.i686.rpm nspr-debuginfo-4.11.0-1.el7_2.x86_64.rpm nss-3.21.0-9.el7_2.i686.rpm nss-3.21.0-9.el7_2.x86_64.rpm nss-debuginfo-3.21.0-9.el7_2.i686.rpm nss-debuginfo-3.21.0-9.el7_2.x86_64.rpm nss-softokn-3.16.2.3-14.2.el7_2.i686.rpm nss-softokn-3.16.2.3-14.2.el7_2.x86_64.rpm nss-softokn-debuginfo-3.16.2.3-14.2.el7_2.i686.rpm nss-softokn-debuginfo-3.16.2.3-14.2.el7_2.x86_64.rpm nss-softokn-freebl-3.16.2.3-14.2.el7_2.i686.rpm nss-softokn-freebl-3.16.2.3-14.2.el7_2.x86_64.rpm nss-sysinit-3.21.0-9.el7_2.x86_64.rpm nss-tools-3.21.0-9.el7_2.x86_64.rpm nss-util-3.21.0-2.2.el7_2.i686.rpm nss-util-3.21.0-2.2.el7_2.x86_64.rpm nss-util-debuginfo-3.21.0-2.2.el7_2.i686.rpm nss-util-debuginfo-3.21.0-2.2.el7_2.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: nspr-debuginfo-4.11.0-1.el7_2.i686.rpm nspr-debuginfo-4.11.0-1.el7_2.x86_64.rpm nspr-devel-4.11.0-1.el7_2.i686.rpm nspr-devel-4.11.0-1.el7_2.x86_64.rpm nss-debuginfo-3.21.0-9.el7_2.i686.rpm nss-debuginfo-3.21.0-9.el7_2.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2016:0685-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:0685.html
Issue date: 2016-04-25

Topic

An update for nss, nspr, nss-softokn, and nss-util is now available for RedHat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. 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 moderate software update cryptography NSS RedHat use-after-free

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 Server (v. 7) - ppc64, ppc64le, s390x, x86_64

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

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

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

Bugs Fixed

1299872 - Rebase RHEL 7.2.z to NSPR 4.11 in preparation for Firefox 45.

1303021 - Rebase RHEL 7.2.z to NSS-util 3.21 in preparation for Firefox 45.

1310581 - Rebase RHEL 7.2.z to NSS 3.21 in preparation for Firefox 45.

1315202 - CVE-2016-1979 nss: Use-after-free during processing of DER encoded keys in NSS (MFSA 2016-36)

1315565 - CVE-2016-1978 nss: Use-after-free in NSS during SSL connections in low memory (MFSA 2016-15)

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