Description (CNA)
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| n/a / n/a | affected n/a |
CWE
No CWE identifiers supplied.
References
- http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff
- http://downloads.asterisk.org/pub/security/AST-2011-011.html
- http://www.securitytracker.com/id?1025734
ADP enrichment
No English description supplied.