[RHSA-2016:0428-01] Moderate: libssh2 security update

[news 28]

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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

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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 . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2016 Red Hat, Inc.

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