OpenSSH Legacy Certificate Signing Information Disclosure

Medium Nessus Network Monitor Plugin ID 5784

Synopsis

The remote host is affected by an information disclosure vulnerability.

Description

OpenSSH 5.6 and 5.7 contain an information disclosure vulnerability which may cause the contents of the stack to be copied into an SSH certificate, which is visible to a remote attacer. This information may lead to further attacks.

Note: PVS has solely relied on the banner of the SSH client to perform this check. Any backported patches or workarounds such as recompiling or edited configurations are not observable through the banner.

Solution

Upgrade to OpenSSH version 5.8 or later.

See Also

http://www.openssh.com/txt/legacy-cert.adv

http://www.openssh.com/txt/release-5.8

Plugin Details

Severity: Medium

ID: 5784

File Name: 5784.prm

Family: SSH

Published: 2011/02/11

Modified: 2016/06/15

Dependencies: 1997, 3059

Nessus ID: 51920

Risk Information

Risk Factor: Medium

CVSSv2

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

CVSSv3

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS3#AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS3#E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Patch Publication Date: 2011/02/04

Vulnerability Publication Date: 2011/02/04

Reference Information

CVE: CVE-2011-0539

BID: 46155