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.
2011-07-06T19:55:03.543
2025-04-11T00:51:21.963
Deferred
CVSSv2: 5.0 (MEDIUM)
AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.0 | Yes |
| Application | digium | asterisk | 1.8.1 | Yes |
| Application | digium | asterisk | 1.8.1 | Yes |
| Application | digium | asterisk | 1.8.1.1 | Yes |
| Application | digium | asterisk | 1.8.1.2 | Yes |
| Application | digium | asterisk | 1.8.2 | Yes |
| Application | digium | asterisk | 1.8.2.1 | Yes |
| Application | digium | asterisk | 1.8.2.2 | Yes |
| Application | digium | asterisk | 1.8.2.3 | Yes |
| Application | digium | asterisk | 1.8.2.4 | Yes |
| Application | digium | asterisk | 1.8.3 | Yes |
| Application | digium | asterisk | 1.8.3 | Yes |
| Application | digium | asterisk | 1.8.3 | Yes |
| Application | digium | asterisk | 1.8.3 | Yes |
| Application | digium | asterisk | 1.8.3.1 | Yes |
| Application | digium | asterisk | 1.8.3.2 | Yes |
| Application | digium | asterisk | 1.8.3.3 | Yes |
| Application | digium | asterisk | 1.8.4 | Yes |
| Application | digium | asterisk | 1.8.4 | Yes |
| Application | digium | asterisk | 1.8.4 | Yes |
| Application | digium | asterisk | 1.8.4 | Yes |
| Application | digium | asterisk | 1.8.4.1 | Yes |
| Application | digium | asterisk | 1.8.4.2 | Yes |
| Application | digium | asterisk | 1.8.4.3 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.0 | Yes |
| Application | digium | asterisk | 1.6.2.1 | Yes |
| Application | digium | asterisk | 1.6.2.1 | Yes |
| Application | digium | asterisk | 1.6.2.2 | Yes |
| Application | digium | asterisk | 1.6.2.3 | Yes |
| Application | digium | asterisk | 1.6.2.4 | Yes |
| Application | digium | asterisk | 1.6.2.5 | Yes |
| Application | digium | asterisk | 1.6.2.6 | Yes |
| Application | digium | asterisk | 1.6.2.6 | Yes |
| Application | digium | asterisk | 1.6.2.6 | Yes |
| Application | digium | asterisk | 1.6.2.15 | Yes |
| Application | digium | asterisk | 1.6.2.16 | Yes |
| Application | digium | asterisk | 1.6.2.16 | Yes |
| Application | digium | asterisk | 1.6.2.16.1 | Yes |
| Application | digium | asterisk | 1.6.2.16.2 | Yes |
| Application | digium | asterisk | 1.6.2.17 | Yes |
| Application | digium | asterisk | 1.6.2.17 | Yes |
| Application | digium | asterisk | 1.6.2.17 | Yes |
| Application | digium | asterisk | 1.6.2.17 | Yes |
| Application | digium | asterisk | 1.6.2.17.1 | Yes |
| Application | digium | asterisk | 1.6.2.17.2 | Yes |
| Application | digium | asterisk | 1.6.2.17.3 | Yes |
| Application | digium | asterisk | 1.6.2.18 | Yes |
| Application | digium | asterisk | 1.6.2.18 | Yes |
| Application | digium | asterisk | 1.6.2.18.1 | Yes |
| Application | digium | asterisk | 1.4.0 | Yes |
| Application | digium | asterisk | 1.4.0 | Yes |
| Application | digium | asterisk | 1.4.0 | Yes |
| Application | digium | asterisk | 1.4.0 | Yes |
| Application | digium | asterisk | 1.4.0 | Yes |
| Application | digium | asterisk | 1.4.1 | Yes |
| Application | digium | asterisk | 1.4.2 | Yes |
| Application | digium | asterisk | 1.4.3 | Yes |
| Application | digium | asterisk | 1.4.4 | Yes |
| Application | digium | asterisk | 1.4.5 | Yes |
| Application | digium | asterisk | 1.4.6 | Yes |
| Application | digium | asterisk | 1.4.7 | Yes |
| Application | digium | asterisk | 1.4.7.1 | Yes |
| Application | digium | asterisk | 1.4.8 | Yes |
| Application | digium | asterisk | 1.4.9 | Yes |
| Application | digium | asterisk | 1.4.10 | Yes |
| Application | digium | asterisk | 1.4.10.1 | Yes |
| Application | digium | asterisk | 1.4.11 | Yes |
| Application | digium | asterisk | 1.4.12 | Yes |
| Application | digium | asterisk | 1.4.12.1 | Yes |
| Application | digium | asterisk | 1.4.13 | Yes |
| Application | digium | asterisk | 1.4.14 | Yes |
| Application | digium | asterisk | 1.4.15 | Yes |
| Application | digium | asterisk | 1.4.16 | Yes |
| Application | digium | asterisk | 1.4.16.1 | Yes |
| Application | digium | asterisk | 1.4.16.2 | Yes |
| Application | digium | asterisk | 1.4.17 | Yes |
| Application | digium | asterisk | 1.4.18 | Yes |
| Application | digium | asterisk | 1.4.19 | Yes |
| Application | digium | asterisk | 1.4.19 | Yes |
| Application | digium | asterisk | 1.4.19 | Yes |
| Application | digium | asterisk | 1.4.19 | Yes |
| Application | digium | asterisk | 1.4.19 | Yes |
| Application | digium | asterisk | 1.4.19.1 | Yes |
| Application | digium | asterisk | 1.4.19.2 | Yes |
| Application | digium | asterisk | 1.4.20 | Yes |
| Application | digium | asterisk | 1.4.20 | Yes |
| Application | digium | asterisk | 1.4.20 | Yes |
| Application | digium | asterisk | 1.4.20 | Yes |
| Application | digium | asterisk | 1.4.20.1 | Yes |
| Application | digium | asterisk | 1.4.21 | Yes |
| Application | digium | asterisk | 1.4.21 | Yes |
| Application | digium | asterisk | 1.4.21 | Yes |
| Application | digium | asterisk | 1.4.21.1 | Yes |
| Application | digium | asterisk | 1.4.21.2 | Yes |
| Application | digium | asterisk | 1.4.22 | Yes |
| Application | digium | asterisk | 1.4.22 | Yes |
| Application | digium | asterisk | 1.4.22 | Yes |
| Application | digium | asterisk | 1.4.22 | Yes |
| Application | digium | asterisk | 1.4.22 | Yes |
| Application | digium | asterisk | 1.4.22 | Yes |
| Application | digium | asterisk | 1.4.22.1 | Yes |
| Application | digium | asterisk | 1.4.22.2 | Yes |
| Application | digium | asterisk | 1.4.23 | Yes |
| Application | digium | asterisk | 1.4.23 | Yes |
| Application | digium | asterisk | 1.4.23 | Yes |
| Application | digium | asterisk | 1.4.23 | Yes |
| Application | digium | asterisk | 1.4.23 | Yes |
| Application | digium | asterisk | 1.4.23.1 | Yes |
| Application | digium | asterisk | 1.4.23.2 | Yes |
| Application | digium | asterisk | 1.4.24 | Yes |
| Application | digium | asterisk | 1.4.24 | Yes |
| Application | digium | asterisk | 1.4.24.1 | Yes |
| Application | digium | asterisk | 1.4.25 | Yes |
| Application | digium | asterisk | 1.4.25 | Yes |
| Application | digium | asterisk | 1.4.25.1 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26 | Yes |
| Application | digium | asterisk | 1.4.26.1 | Yes |
| Application | digium | asterisk | 1.4.26.2 | Yes |
| Application | digium | asterisk | 1.4.26.3 | Yes |
| Application | digium | asterisk | 1.4.27 | Yes |
| Application | digium | asterisk | 1.4.27 | Yes |
| Application | digium | asterisk | 1.4.27 | Yes |
| Application | digium | asterisk | 1.4.27 | Yes |
| Application | digium | asterisk | 1.4.27 | Yes |
| Application | digium | asterisk | 1.4.27 | Yes |
| Application | digium | asterisk | 1.4.27.1 | Yes |
| Application | digium | asterisk | 1.4.28 | Yes |
| Application | digium | asterisk | 1.4.28 | Yes |
| Application | digium | asterisk | 1.4.29 | Yes |
| Application | digium | asterisk | 1.4.29 | Yes |
| Application | digium | asterisk | 1.4.29.1 | Yes |
| Application | digium | asterisk | 1.4.30 | Yes |
| Application | digium | asterisk | 1.4.30 | Yes |
| Application | digium | asterisk | 1.4.30 | Yes |
| Application | digium | asterisk | 1.4.31 | Yes |
| Application | digium | asterisk | 1.4.31 | Yes |
| Application | digium | asterisk | 1.4.31 | Yes |
| Application | digium | asterisk | 1.4.32 | Yes |
| Application | digium | asterisk | 1.4.32 | Yes |
| Application | digium | asterisk | 1.4.33 | Yes |
| Application | digium | asterisk | 1.4.33 | Yes |
| Application | digium | asterisk | 1.4.33 | Yes |
| Application | digium | asterisk | 1.4.33.1 | Yes |
| Application | digium | asterisk | 1.4.34 | Yes |
| Application | digium | asterisk | 1.4.34 | Yes |
| Application | digium | asterisk | 1.4.34 | Yes |
| Application | digium | asterisk | 1.4.35 | Yes |
| Application | digium | asterisk | 1.4.35 | Yes |
| Application | digium | asterisk | 1.4.36 | Yes |
| Application | digium | asterisk | 1.4.36 | Yes |
| Application | digium | asterisk | 1.4.37 | Yes |
| Application | digium | asterisk | 1.4.37 | Yes |
| Application | digium | asterisk | 1.4.38 | Yes |
| Application | digium | asterisk | 1.4.38 | Yes |
| Application | digium | asterisk | 1.4.39 | Yes |
| Application | digium | asterisk | 1.4.39 | Yes |
| Application | digium | asterisk | 1.4.39.1 | Yes |
| Application | digium | asterisk | 1.4.39.2 | Yes |
| Application | digium | asterisk | 1.4.40 | Yes |
| Application | digium | asterisk | 1.4.40 | Yes |
| Application | digium | asterisk | 1.4.40 | Yes |
| Application | digium | asterisk | 1.4.40 | Yes |
| Application | digium | asterisk | 1.4.40.1 | Yes |
| Application | digium | asterisk | 1.4.40.2 | Yes |
| Application | digium | asterisk | 1.4.41 | Yes |
| Application | digium | asterisk | 1.4.41 | Yes |
| Application | digium | asterisk | 1.4.41.1 | Yes |
| Application | digium | asterisk | c.3.0 | Yes |
| Application | digium | asterisk | c.3.1.0 | Yes |
| Application | digium | asterisk | c.3.1.1 | Yes |
| Application | digium | asterisk | c.3.2.2 | Yes |
| Application | digium | asterisk | c.3.2.3 | Yes |
| Application | digium | asterisk | c.3.3.2 | Yes |
| Application | digium | asterisk | c.3.6.2 | Yes |
| Application | digium | asterisk | c.3.6.3 | Yes |
| Application | digium | asterisk | c.3.6.4 | Yes |