Detections
Analytics
OpenSSH X11 < 5.1 Session Hijacking
medium Nessus Network Monitor Plugin ID 4598
Synopsis
The remote host is vulnerable to a local 'session hijacking' flaw.Description
According to its banner, the version of SSH installed on the remote host is older than 5.1. Such versions may allow a local user to hijack X11 sessions because it improperly checks user privileges before re-binding a port. In order for the attack to be successful, the 'X11UseLocalhost' option would need to be disabled. By default, the option is enabled. Further, the OpenSSH service would need to be running on an operating system (such as HP-UX) where the effective user ID is not checked.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.
Solution
Upgrade to version 5.1 or higher.See Also
Plugin Details
Severity: Medium
ID: 4598
Family: SSH
Published: 7/22/2008
Updated: 3/6/2019
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:openbsd:openssh
Reference Information
CVE: CVE-2008-3259, CVE-2008-5161