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Red Hat Enterprise Linux 6/7: RHSA-2017-0286-01 Moderate: OpenSSL DoS

red hat
Calendar Grey February 20, 2017
Scroller Redhat
Security enhancement for OpenSSL in Red Hat tackling moderate vulnerabilities that may result in Denial of Service and integer overflow issues.
An update for openssl 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

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.

Summary

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.
Security Fix(es):
* An integer underflow leading to an out of bounds read flaw was found in OpenSSL. A remote attacker could possibly use this flaw to crash a 32-bit TLS/SSL server or client using OpenSSL if it used the RC4-MD5 cipher suite. (CVE-2017-3731)
* A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections form other clients. (CVE-2016-8610)

Topics%20covered

Topics Covered

security advisory moderate red hat enterprise linux openssl dos integer underflow

References

https://access.redhat.com/security/cve/CVE-2016-8610 https://access.redhat.com/security/cve/CVE-2017-3731 https://access.redhat.com/security/updates/classification#moderate https://openssl-library.org/news/secadv/20170126.txt

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: openssl-1.0.1e-48.el6_8.4.src.rpm
i386: openssl-1.0.1e-48.el6_8.4.i686.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.i686.rpm
x86_64: openssl-1.0.1e-48.el6_8.4.i686.rpm openssl-1.0.1e-48.el6_8.4.x86_64.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.i686.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: openssl-debuginfo-1.0.1e-48.el6_8.4.i686.rpm openssl-devel-1.0.1e-48.el6_8.4.i686.rpm openssl-perl-1.0.1e-48.el6_8.4.i686.rpm openssl-static-1.0.1e-48.el6_8.4.i686.rpm
x86_64: openssl-debuginfo-1.0.1e-48.el6_8.4.i686.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.x86_64.rpm openssl-devel-1.0.1e-48.el6_8.4.i686.rpm openssl-devel-1.0.1e-48.el6_8.4.x86_64.rpm openssl-perl-1.0.1e-48.el6_8.4.x86_64.rpm openssl-static-1.0.1e-48.el6_8.4.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: openssl-1.0.1e-48.el6_8.4.src.rpm
x86_64: openssl-1.0.1e-48.el6_8.4.i686.rpm openssl-1.0.1e-48.el6_8.4.x86_64.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.i686.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: openssl-debuginfo-1.0.1e-48.el6_8.4.i686.rpm openssl-debuginfo-1.0.1e-48.el6_8.4.x86_64.rpm openssl-devel-1.0.1e-48.el6_8.4.i686.rpm

Read the Full Advisory


Advisory ID: RHSA-2017:0286-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0286.html
Issue date: 2017-02-20

Topic

An update for openssl is now available for Red Hat Enterprise Linux 6 andRed Hat 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 red hat enterprise linux openssl dos integer underflow

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

1384743 - CVE-2016-8610 SSL/TLS: Malformed plain-text ALERT packets could cause remote DoS

1416852 - CVE-2017-3731 openssl: Truncated packet could crash via OOB read

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