Description
The PPTP VPN service in Watchguard Firebox before 10, when performing the MS-CHAPv2 authentication handshake, generates different error codes depending on whether the username is valid or invalid, which allows remote attackers to enumerate valid usernames.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://www.mwrinfosecurity.com/publications/mwri_watchguard-firebox-pptp-vpn-user-enumeration-advisory_2008-04-04.pdf ↗
- http://www.osvdb.org/44218 ↗
- http://www.vupen.com/english/advisories/2008/1152/references ↗
- http://www.securityfocus.com/bid/28619 ↗
- https://exchange.xforce.ibmcloud.com/vulnerabilities/41683 ↗
- http://secunia.com/advisories/29708 ↗
- http://www.securitytracker.com/id?1019796 ↗