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CVE-2011-2666

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Date: July 6, 2011

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.

Language: C

Severity Score

Related Resources (6)

https://nvd.nist.gov/vuln/detail/CVE-2011-2666
https://security-tracker.debian.org/tracker/CVE-2011-2666
https://exchange.xforce.ibmcloud.com/vulnerabilities/68472
http://downloads.asterisk.org/pub/security/AST-2011-011.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2011-2666
https://www.mend.io/vulnerability-database/CVE-2011-2666

Severity Score

Weakness Type (CWE)

Configuration

CWE-16

Top Fix

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CVSS v3

Base Score:
Attack Vector (AV):
Attack Complexity (AC):
Privileges Required (PR):
User Interaction (UI):
Scope (S):
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV):
Access Complexity (AC):
Authentication (AU):
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE
Additional information:

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