libssh2 security update

2016-03-1012:05:04

CentOS Project

lists.centos.org

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

0.005 Low

EPSS

Percentile

77.6%

JSON

CentOS Errata and Security Advisory CESA-2016:0428

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.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2016-March/083888.html
https://lists.centos.org/pipermail/centos-announce/2016-March/083889.html

Affected packages:
libssh2
libssh2-devel
libssh2-docs

Upstream details at:
https://access.redhat.com/errata/RHSA-2016:0428

OSVersionArchitecturePackageVersionFilename
CentOS6i686libssh2< 1.4.2-2.el6_7.1libssh2-1.4.2-2.el6_7.1.i686.rpm
CentOS6i686libssh2-devel< 1.4.2-2.el6_7.1libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
CentOS6i686libssh2-docs< 1.4.2-2.el6_7.1libssh2-docs-1.4.2-2.el6_7.1.i686.rpm
CentOS6i686libssh2< 1.4.2-2.el6_7.1libssh2-1.4.2-2.el6_7.1.i686.rpm
CentOS6x86_64libssh2< 1.4.2-2.el6_7.1libssh2-1.4.2-2.el6_7.1.x86_64.rpm
CentOS6i686libssh2-devel< 1.4.2-2.el6_7.1libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
CentOS6x86_64libssh2-devel< 1.4.2-2.el6_7.1libssh2-devel-1.4.2-2.el6_7.1.x86_64.rpm
CentOS6x86_64libssh2-docs< 1.4.2-2.el6_7.1libssh2-docs-1.4.2-2.el6_7.1.x86_64.rpm
CentOS7i686libssh2< 1.4.3-10.el7_2.1libssh2-1.4.3-10.el7_2.1.i686.rpm
CentOS7x86_64libssh2< 1.4.3-10.el7_2.1libssh2-1.4.3-10.el7_2.1.x86_64.rpm

OS	Version	Architecture	Package	Version	Filename
CentOS	6	i686	libssh2	< 1.4.2-2.el6_7.1	libssh2-1.4.2-2.el6_7.1.i686.rpm
CentOS	6	i686	libssh2-devel	< 1.4.2-2.el6_7.1	libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
CentOS	6	i686	libssh2-docs	< 1.4.2-2.el6_7.1	libssh2-docs-1.4.2-2.el6_7.1.i686.rpm
CentOS	6	i686	libssh2	< 1.4.2-2.el6_7.1	libssh2-1.4.2-2.el6_7.1.i686.rpm
CentOS	6	x86_64	libssh2	< 1.4.2-2.el6_7.1	libssh2-1.4.2-2.el6_7.1.x86_64.rpm
CentOS	6	i686	libssh2-devel	< 1.4.2-2.el6_7.1	libssh2-devel-1.4.2-2.el6_7.1.i686.rpm
CentOS	6	x86_64	libssh2-devel	< 1.4.2-2.el6_7.1	libssh2-devel-1.4.2-2.el6_7.1.x86_64.rpm
CentOS	6	x86_64	libssh2-docs	< 1.4.2-2.el6_7.1	libssh2-docs-1.4.2-2.el6_7.1.x86_64.rpm
CentOS	7	i686	libssh2	< 1.4.3-10.el7_2.1	libssh2-1.4.3-10.el7_2.1.i686.rpm
CentOS	7	x86_64	libssh2	< 1.4.3-10.el7_2.1	libssh2-1.4.3-10.el7_2.1.x86_64.rpm