Debian DSA-3488-1 : libssh - security update

medium Nessus Plugin ID 88916


The remote Debian host is missing a security-related update.


Aris Adamantiadis discovered that libssh, a tiny C SSH library, incorrectly generated a short ephemeral secret for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods.
The resulting secret is 128 bits long, instead of the recommended sizes of 1024 and 2048 bits respectively. This flaw could allow an eavesdropper with enough resources to decrypt or intercept SSH sessions.


Upgrade the libssh packages.

For the oldstable distribution (wheezy), this problem has been fixed in version 0.5.4-1+deb7u3. This update also includes fixes for CVE-2014-8132 and CVE-2015-3146, which were previously scheduled for the next wheezy point release.

For the stable distribution (jessie), this problem has been fixed in version 0.6.3-4+deb8u2.

See Also

Plugin Details

Severity: Medium

ID: 88916

File Name: debian_DSA-3488.nasl

Version: 2.6

Type: local

Agent: unix

Published: 2/24/2016

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4.3

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


Risk Factor: Medium

Base Score: 5.9

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libssh, cpe:/o:debian:debian_linux:7.0, cpe:/o:debian:debian_linux:8.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2/23/2016

Reference Information

CVE: CVE-2016-0739

DSA: 3488