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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2016.0657
Moderate: libssh2 security update
11 March 2016
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libssh2
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-0787
Reference: ESB-2016.0458
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2016-0428.html
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Red Hat Security Advisory
Synopsis: Moderate: libssh2 security update
Advisory ID: RHSA-2016:0428-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0428.html
Issue date: 2016-03-10
CVE Names: CVE-2016-0787
=====================================================================
1. Summary:
Updated libssh2 packages that fix one security issue are now available
for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, 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) - 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) - noarch, 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) - noarch, x86_64
3. Description:
The libssh2 packages provide a library that implements the SSHv2 protocol.
A type confusion issue was found in the way libssh2 generated ephemeral
secrets for the diffie-hellman-group1 and diffie-hellman-group14 key
exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use
significantly less secure random parameters. (CVE-2016-0787)
Red Hat would like to thank Aris Adamantiadis for reporting this issue.
All libssh2 users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. After installing these
updated packages, all running applications using libssh2 must be restarted
for this update to take effect.
4. Solution:
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
1306021 - CVE-2016-0787 libssh2: bits/bytes confusion resulting in truncated Diffie-Hellman secret length
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
libssh2-1.4.2-2.el6_7.1.src.rpm
i386:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
x86_64:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-docs-1.4.2-2.el6_7.1.i686.rpm
x86_64:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-docs-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
libssh2-1.4.2-2.el6_7.1.src.rpm
x86_64:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-docs-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
libssh2-1.4.2-2.el6_7.1.src.rpm
i386:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
ppc64:
libssh2-1.4.2-2.el6_7.1.ppc.rpm
libssh2-1.4.2-2.el6_7.1.ppc64.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.ppc.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.ppc64.rpm
s390x:
libssh2-1.4.2-2.el6_7.1.s390.rpm
libssh2-1.4.2-2.el6_7.1.s390x.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.s390.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.s390x.rpm
x86_64:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
i386:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-docs-1.4.2-2.el6_7.1.i686.rpm
ppc64:
libssh2-debuginfo-1.4.2-2.el6_7.1.ppc.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.ppc64.rpm
libssh2-devel-1.4.2-2.el6_7.1.ppc.rpm
libssh2-devel-1.4.2-2.el6_7.1.ppc64.rpm
libssh2-docs-1.4.2-2.el6_7.1.ppc64.rpm
s390x:
libssh2-debuginfo-1.4.2-2.el6_7.1.s390.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.s390x.rpm
libssh2-devel-1.4.2-2.el6_7.1.s390.rpm
libssh2-devel-1.4.2-2.el6_7.1.s390x.rpm
libssh2-docs-1.4.2-2.el6_7.1.s390x.rpm
x86_64:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-docs-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
libssh2-1.4.2-2.el6_7.1.src.rpm
i386:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
x86_64:
libssh2-1.4.2-2.el6_7.1.i686.rpm
libssh2-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
i386:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-docs-1.4.2-2.el6_7.1.i686.rpm
x86_64:
libssh2-debuginfo-1.4.2-2.el6_7.1.i686.rpm
libssh2-debuginfo-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
libssh2-devel-1.4.2-2.el6_7.1.x86_64.rpm
libssh2-docs-1.4.2-2.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Client (v. 7):
Source:
libssh2-1.4.3-10.el7_2.1.src.rpm
x86_64:
libssh2-1.4.3-10.el7_2.1.i686.rpm
libssh2-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch:
libssh2-docs-1.4.3-10.el7_2.1.noarch.rpm
x86_64:
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-devel-1.4.3-10.el7_2.1.i686.rpm
libssh2-devel-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
libssh2-1.4.3-10.el7_2.1.src.rpm
x86_64:
libssh2-1.4.3-10.el7_2.1.i686.rpm
libssh2-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch:
libssh2-docs-1.4.3-10.el7_2.1.noarch.rpm
x86_64:
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-devel-1.4.3-10.el7_2.1.i686.rpm
libssh2-devel-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
libssh2-1.4.3-10.el7_2.1.src.rpm
ppc64:
libssh2-1.4.3-10.el7_2.1.ppc.rpm
libssh2-1.4.3-10.el7_2.1.ppc64.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.ppc.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.ppc64.rpm
ppc64le:
libssh2-1.4.3-10.el7_2.1.ppc64le.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.ppc64le.rpm
s390x:
libssh2-1.4.3-10.el7_2.1.s390.rpm
libssh2-1.4.3-10.el7_2.1.s390x.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.s390.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.s390x.rpm
x86_64:
libssh2-1.4.3-10.el7_2.1.i686.rpm
libssh2-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
noarch:
libssh2-docs-1.4.3-10.el7_2.1.noarch.rpm
ppc64:
libssh2-debuginfo-1.4.3-10.el7_2.1.ppc.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.ppc64.rpm
libssh2-devel-1.4.3-10.el7_2.1.ppc.rpm
libssh2-devel-1.4.3-10.el7_2.1.ppc64.rpm
ppc64le:
libssh2-debuginfo-1.4.3-10.el7_2.1.ppc64le.rpm
libssh2-devel-1.4.3-10.el7_2.1.ppc64le.rpm
s390x:
libssh2-debuginfo-1.4.3-10.el7_2.1.s390.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.s390x.rpm
libssh2-devel-1.4.3-10.el7_2.1.s390.rpm
libssh2-devel-1.4.3-10.el7_2.1.s390x.rpm
x86_64:
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-devel-1.4.3-10.el7_2.1.i686.rpm
libssh2-devel-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
libssh2-1.4.3-10.el7_2.1.src.rpm
x86_64:
libssh2-1.4.3-10.el7_2.1.i686.rpm
libssh2-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
noarch:
libssh2-docs-1.4.3-10.el7_2.1.noarch.rpm
x86_64:
libssh2-debuginfo-1.4.3-10.el7_2.1.i686.rpm
libssh2-debuginfo-1.4.3-10.el7_2.1.x86_64.rpm
libssh2-devel-1.4.3-10.el7_2.1.i686.rpm
libssh2-devel-1.4.3-10.el7_2.1.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/
7. References:
https://access.redhat.com/security/cve/CVE-2016-0787
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2016 Red Hat, Inc.
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