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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 a shell remotely >> NSS Library SSLv2 Challenge Overflow

Vulnerability Assessment Details

NSS Library SSLv2 Challenge Overflow

Vulnerability Assessment Summary
Tests for the NSS SSLv2 challenge overflow

Detailed Explanation for this Vulnerability Assessment

The remote host seems to be using the Mozilla Network Security Services (NSS)
Library, a set of libraries designed to support the developement of
security-enabled client/server application.

There seems to be a flaw in the remote version of this library, in the SSLv2
handling code, which may permit a possible hacker to cause a heap overflow and
therefore execute arbitrary commands on the remote host. To exploit this
flaw, a possible hacker would need to send a malformed SSLv2 'hello' message
to the remote service.

Solution : Upgrade the remote service to use NSS 3.9.2 or newer.
Network Security Threat Level: High

Networks Security ID: 11015

Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Digital Defense

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