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

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Hash: SHA1

====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: libssh2 security update
Advisory ID:       RHSA-2016:0428-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.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 . More contact
details at https://access.redhat.com/security/team/contact

Copyright 2016 Red Hat, Inc.
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Red Hat: RHSA-2016-0428-01 Moderate: libssh2 Type Confusion Security Update

red hat

March 10, 2016

Updated libssh2 packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7

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

Summary

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.

Topics Covered

security advisory Red Hat moderate threat security impact libssh2 type confusion SSH update

References

https://access.redhat.com/security/cve/CVE-2016-0787 https://access.redhat.com/security/updates/classification#moderate

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:

Read the Full Advisory

Advisory ID: RHSA-2016:0428-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2016:0428.html

Issue date: 2016-03-10

Topic

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 securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics Covered

security advisory Red Hat moderate threat security impact libssh2 type confusion SSH update

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

Bugs Fixed

1306021 - CVE-2016-0787 libssh2: bits/bytes confusion resulting in truncated Diffie-Hellman secret length

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Red Hat: RHSA-2016-0428-01 Moderate: libssh2 Type Confusion Security Update

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