CVE-2011-2666 Information disclosure in n/a
Remote attackers can enumerate valid SIP account names by observing response differences when the alwaysauthreject option is disabled in Asterisk.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-2666?
CVE-2011-2666 is a medium-severity vulnerability in Digium Asterisk, published on 6 Jul 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-16
Which versions are affected by CVE-2011-2666?
It affects 1 product.
Products include Digium Asterisk.
How do I fix CVE-2011-2666?
Change a configuration setting.
Is CVE-2011-2666 being exploited?
There is no known exploitation of CVE-2011-2666 in the wild and no public exploit code.
Other vulnerabilities in Digium Asterisk
Sources
Also known as DEBIAN-CVE-2011-2666, GHSA-6w9r-hx89-h863.