Vulnerability Description
The default configuration of the SIP channel driver in Asterisk Open Source 1.4.x through 1.4.41.2 and 1.6.2.x through 1.6.2.18.2 does not enable the alwaysauthreject option, which allows remote attackers to enumerate account names by making a series of invalid SIP requests and observing the differences in the responses for different usernames, a different vulnerability than CVE-2011-2536.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | 1.6.2.0 |
Related Weaknesses (CWE)
References
- http://downloads.asterisk.org/pub/security/AST-2011-011.htmlVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68472
- http://downloads.asterisk.org/pub/security/AST-2011-011.htmlVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68472
FAQ
What is CVE-2011-2666?
CVE-2011-2666 is a vulnerability with a CVSS score of 5.0 (MEDIUM). The default configuration of the SIP channel driver in Asterisk Open Source 1.4.x through 1.4.41.2 and 1.6.2.x through 1.6.2.18.2 does not enable the alwaysauthreject option, which allows remote attac...
How severe is CVE-2011-2666?
CVE-2011-2666 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-2666?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk.