OpenSSH Legacy Certificate Signing Information Disclosure

medium Nessus Network Monitor Plugin ID 5784


The remote host is affected by an information disclosure vulnerability.


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: NNM 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.


Upgrade to OpenSSH version 5.8 or later.

See Also

Plugin Details

Severity: Medium

ID: 5784

Family: SSH

Published: 2/11/2011

Updated: 3/6/2019

Nessus ID: 51920

Risk Information


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

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


Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: cpe:/a:openbsd:openssh

Patch Publication Date: 2/4/2011

Vulnerability Publication Date: 2/4/2011

Reference Information

CVE: CVE-2011-0539

BID: 46155