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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 v3.1

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

CVSS v2

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

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