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.
References (7)
Core 7
Core References
Exploit, Patch x_refsource_misc
http://www.mwrinfosecurity.com/publications/mwri_watchguard-firebox-pptp-vpn-user-enumeration-advisory_2008-04-04.pdf
Third Party Advisory, VDB Entry vdb-entry
x_refsource_osvdb
http://www.osvdb.org/44218
Vendor Advisory vdb-entry
x_refsource_vupen
http://www.vupen.com/english/advisories/2008/1152/references
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/28619
Third Party Advisory, VDB Entry vdb-entry
x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/41683
Vendor Advisory third-party-advisory
x_refsource_secunia
http://secunia.com/advisories/29708
Third Party Advisory, VDB Entry vdb-entry
x_refsource_sectrack
http://www.securitytracker.com/id?1019796
Scores
EPSS
0.0174
EPSS Percentile
75.0%
Details
CWE
CWE-200
Status
published
Products (2)
watchguard/firebox_pptp_vpn
4.9
watchguard/firebox_pptp_vpn
5.0
Published
Apr 07, 2008
Tracked Since
Feb 18, 2026