OpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute arbitrary commands by providing the command to the ssh daemon.

The version of SunSSH running on the remote host has an information disclosure vulnerability.  A design flaw in the SSH specification could allow a man-in-the-middle attacker to recover up to 32 bits of plaintext from an SSH-protected connection in the standard configuration.  An attacker could exploit this to gain access to sensitive information.

Note that this version of SunSSH is also prone to several additional issues but Nessus did not test for them.

The remote host is running a version of OpenSSH which is older than 2.1.1. If the UseLogin option is enabled, then sshd does not switch to the uid of the user logging in. Instead, sshd relies on login(1) to do the job. However, if the user specifies a command for remote execution, login(1) cannot be used and sshd fails to set the correct user id, so the command is run with the same privileges as sshd (usually root privileges).

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.

According to its banner, the remote host appears to be running OpenSSH version older than 2.1.1. Such versions are reportedly affected by a local privilege esclation vulnerability.

If the UseLogin option is enabled, then sshd does not switch to the uid of the user logging in.  Instead, sshd relies on login(1) to do the job.  However, if the user specifies a command for remote execution, login(1) cannot be used and sshd fails to set the correct user id, so the command is run with the same privilege as sshd (usually root privileges).

ID	Name	Product	Family	Type	Severity
55992	SunSSH < 1.1.1 / 1.3 CBC Plaintext Disclosure	Nessus	Misc.	Remote	critical
1991	OpenSSH < 2.1.1 UseLogin Local Privilege Escalation	Nessus Network Monitor	SSH		high
10439	OpenSSH < 2.1.1 UseLogin Local Privilege Escalation	Nessus	Misc.	Remote	high

Detections

Analytics

CVE-2000-0525

high

Tenable Plugins

critical

high

high