CVE-2011-2666

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.59%
Vendor Advisory asterisk.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://exchange.xforce.ibmcloud.com/vulnerabilities/68472 vdb entry
http://downloads.asterisk.org/pub/security/AST-2011-011.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2011-2666?
CVE-2011-2666 has been scored as a medium severity vulnerability.
How to fix CVE-2011-2666?
To fix CVE-2011-2666, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-2666 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2011-2666 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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