Debian DLA-425-1 : libssh security update

Medium Nessus Plugin ID 88913


The remote Debian host is missing a security update.


Aris Adamantiadis of the libssh team discovered that libssh, an SSH2 protocol implementation used by many applications, did not generate sufficiently long Diffie-Hellman secrets.

This vulnerability could be exploited by an eavesdropper to decrypt and to intercept SSH sessions.

For the oldoldstable distribution (squeeze), this has been fixed in version 0.4.5-3+squeeze3.

For the oldstable (wheezy) and stable (jessie) distributions, this will be fixed soon.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Upgrade the affected libssh package.

See Also

Plugin Details

Severity: Medium

ID: 88913

File Name: debian_DLA-425.nasl

Version: 2.9

Type: local

Agent: unix

Published: 2016/02/24

Updated: 2020/03/12

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 5.9

Temporal Score: 5.2

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libssh, cpe:/o:debian:debian_linux:6.0

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/02/23

Reference Information

CVE: CVE-2016-0739