Security Advisory 06 – 042 – The VSAOD server uses a weak algorithm to obscure passwords on the wire and within configuration files
Vulnerability discovery and development:
Portcullis Security Testing Services discovered this vulnerability during an application assessment.
Further research was then carried out post assessment.
Credit for Discovery:
Tim Brown and Mark Lowe – Portcullis Computer Security Ltd.
All known versions of Visionsoft Audit, this vulnerability was discovered for version 220.127.116.11.
Passwords used to authenticate with the remote VSAOD server prior to the execution of the requested executable are obscured on the wire and in configuration files using an XOR based algorithm.
An attacker who compromised a system running a VSAOD server could unobscure the password identified through eavesdropping the network traffic or from the configuration file. Typically this will be a domain account with privileged access to the systems on the network. The attacker potentially will be able to authenticate with these systems using other servers. Note: The configuration file typically has read permissions for both Users and Power Users.
Exploit code is not required.
e-mailed – 16th January 2007
e-mailed – 26th February 2007
e-mailed – 15th March 2007