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Red Hat Enterprise Linux: RHSA-2016-2674-01 Moderate: libgcrypt Design Flaw

red hat
Calendar Grey November 8, 2016
Scroller Redhat
Notification regarding a significant libgcrypt security vulnerability on Red Hat Enterprise Linux classified as moderate. Discover further details.
An update for libgcrypt 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

Summary

The libgcrypt library provides general-purpose implementations of various cryptographic algorithms.
Security Fix(es):
* A design flaw was found in the libgcrypt PRNG (Pseudo-Random Number Generator). An attacker able to obtain the first 580 bytes of the PRNG output could predict the following 20 bytes. (CVE-2016-6313)
Red Hat would like to thank Felix Dörre and Vladimir Klebanov for reporting this issue.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux moderate impact design flaw libgcrypt

References

https://access.redhat.com/security/cve/CVE-2016-6313 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: libgcrypt-1.4.5-12.el6_8.src.rpm
i386: libgcrypt-1.4.5-12.el6_8.i686.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm
x86_64: libgcrypt-1.4.5-12.el6_8.i686.rpm libgcrypt-1.4.5-12.el6_8.x86_64.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm libgcrypt-devel-1.4.5-12.el6_8.i686.rpm
x86_64: libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.x86_64.rpm libgcrypt-devel-1.4.5-12.el6_8.i686.rpm libgcrypt-devel-1.4.5-12.el6_8.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: libgcrypt-1.4.5-12.el6_8.src.rpm
x86_64: libgcrypt-1.4.5-12.el6_8.i686.rpm libgcrypt-1.4.5-12.el6_8.x86_64.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.x86_64.rpm libgcrypt-devel-1.4.5-12.el6_8.i686.rpm libgcrypt-devel-1.4.5-12.el6_8.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: libgcrypt-1.4.5-12.el6_8.src.rpm
i386: libgcrypt-1.4.5-12.el6_8.i686.rpm libgcrypt-debuginfo-1.4.5-12.el6_8.i686.rpm

Read the Full Advisory


Advisory ID: RHSA-2016:2674-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2674.html
Issue date: 2016-11-08

Topic

An update for libgcrypt 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 security update Red Hat Enterprise Linux moderate impact design flaw libgcrypt

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 Workstation (v. 6) - i386, x86_64

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

Bugs Fixed

1366105 - CVE-2016-6313 libgcrypt: PRNG output is predictable

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