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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Gain root remotely >> pam_smb / pam_ntdom overflow


Vulnerability Assessment Details

pam_smb / pam_ntdom overflow

Vulnerability Assessment Summary
Attempts to overflow the remote pam_smb

Detailed Explanation for this Vulnerability Assessment

The remote telnet server shut the connection abruptly when given
a long username followed by a password.

Although Nessus could not be 100% positive, it may mean that
the remote host is using an older pam_smb or pam_ntdom
pluggable authentication module to validate user credentials
against a NT domain.

Older version of these modules have a well documented buffer
overflow which may permit an intruder to execute arbitrary
commands as root on this host.

It may also mean that this telnet server is weak and crashes
when issued a too long username, in this case this host is
vulnerable to a similar flow.

This may also be a false positive.


Solution :

. if pam_smb or pam_ntdom is being used on this host, be sure to upgrade it
to the newest non-devel version.

. if the remote telnet server crashed, contact your vendor for a patch

Network Security Threat Level: High

Networks Security ID: 1666

Vulnerability Assessment Copyright: This script is Copyright (C) 2000 Renaud Deraison

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