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.
CVSS Details
- CVSS 3.1 Base Score: 5.3
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade asterisk | Jul 30, 2024 | Jul 6, 2011 |
| Freebsd | — | Upgrade asterisk14Upgrade asterisk16Upgrade asterisk18 | Dec 10, 2025 | Jun 25, 2011 |
| Gentoo Linux | — | Upgrade net-misc/asterisk. | Oct 30, 2017 | Jul 6, 2011 |
| Ubuntu | — | Upgrade asterisk | Nov 19, 2024 | Jul 6, 2011 |
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