Vulnerability Details CVE-2011-2666
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 68.0%
CVSS Severity
CVSS v2 Score 5.0
References
Products affected by CVE-2011-2666
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cpe:2.3:a:digium:asterisk:1.4.0
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cpe:2.3:a:digium:asterisk:1.4.1
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cpe:2.3:a:digium:asterisk:1.4.10
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cpe:2.3:a:digium:asterisk:1.4.10.1
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cpe:2.3:a:digium:asterisk:1.4.11
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cpe:2.3:a:digium:asterisk:1.4.12
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cpe:2.3:a:digium:asterisk:1.4.12.1
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cpe:2.3:a:digium:asterisk:1.4.13
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cpe:2.3:a:digium:asterisk:1.4.14
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cpe:2.3:a:digium:asterisk:1.4.15
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cpe:2.3:a:digium:asterisk:1.4.16
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cpe:2.3:a:digium:asterisk:1.4.16.1
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cpe:2.3:a:digium:asterisk:1.4.16.2
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cpe:2.3:a:digium:asterisk:1.4.17
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cpe:2.3:a:digium:asterisk:1.4.18
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cpe:2.3:a:digium:asterisk:1.4.19
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cpe:2.3:a:digium:asterisk:1.4.19.1
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cpe:2.3:a:digium:asterisk:1.4.19.2
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cpe:2.3:a:digium:asterisk:1.4.2
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cpe:2.3:a:digium:asterisk:1.4.20
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cpe:2.3:a:digium:asterisk:1.4.20.1
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cpe:2.3:a:digium:asterisk:1.4.21
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cpe:2.3:a:digium:asterisk:1.4.21.1
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cpe:2.3:a:digium:asterisk:1.4.21.2
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cpe:2.3:a:digium:asterisk:1.4.22
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cpe:2.3:a:digium:asterisk:1.4.22.1
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cpe:2.3:a:digium:asterisk:1.4.22.2
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cpe:2.3:a:digium:asterisk:1.4.23
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cpe:2.3:a:digium:asterisk:1.4.23.1
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cpe:2.3:a:digium:asterisk:1.4.23.2
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cpe:2.3:a:digium:asterisk:1.4.24
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cpe:2.3:a:digium:asterisk:1.4.24.1
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cpe:2.3:a:digium:asterisk:1.4.25
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cpe:2.3:a:digium:asterisk:1.4.25.1
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cpe:2.3:a:digium:asterisk:1.4.26
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cpe:2.3:a:digium:asterisk:1.4.26.1
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cpe:2.3:a:digium:asterisk:1.4.26.2
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cpe:2.3:a:digium:asterisk:1.4.26.3
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cpe:2.3:a:digium:asterisk:1.4.27
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cpe:2.3:a:digium:asterisk:1.4.27.1
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cpe:2.3:a:digium:asterisk:1.4.28
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cpe:2.3:a:digium:asterisk:1.4.29
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cpe:2.3:a:digium:asterisk:1.4.29.1
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cpe:2.3:a:digium:asterisk:1.4.3
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cpe:2.3:a:digium:asterisk:1.4.30
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cpe:2.3:a:digium:asterisk:1.4.31
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cpe:2.3:a:digium:asterisk:1.4.32
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cpe:2.3:a:digium:asterisk:1.4.33
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cpe:2.3:a:digium:asterisk:1.4.33.1
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cpe:2.3:a:digium:asterisk:1.4.34
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cpe:2.3:a:digium:asterisk:1.4.35
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cpe:2.3:a:digium:asterisk:1.4.36
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cpe:2.3:a:digium:asterisk:1.4.37
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cpe:2.3:a:digium:asterisk:1.4.38
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cpe:2.3:a:digium:asterisk:1.4.39
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cpe:2.3:a:digium:asterisk:1.4.39.1
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cpe:2.3:a:digium:asterisk:1.4.39.2
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cpe:2.3:a:digium:asterisk:1.4.4
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cpe:2.3:a:digium:asterisk:1.4.40
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cpe:2.3:a:digium:asterisk:1.4.40.1
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cpe:2.3:a:digium:asterisk:1.4.40.2
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cpe:2.3:a:digium:asterisk:1.4.41
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cpe:2.3:a:digium:asterisk:1.4.41.1
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cpe:2.3:a:digium:asterisk:1.4.41.2
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cpe:2.3:a:digium:asterisk:1.4.5
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cpe:2.3:a:digium:asterisk:1.4.6
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cpe:2.3:a:digium:asterisk:1.4.7
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cpe:2.3:a:digium:asterisk:1.4.7.1
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cpe:2.3:a:digium:asterisk:1.4.8
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cpe:2.3:a:digium:asterisk:1.4.9
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cpe:2.3:a:digium:asterisk:1.6.2.0
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cpe:2.3:a:digium:asterisk:1.6.2.1
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cpe:2.3:a:digium:asterisk:1.6.2.15
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cpe:2.3:a:digium:asterisk:1.6.2.16
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cpe:2.3:a:digium:asterisk:1.6.2.16.1
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cpe:2.3:a:digium:asterisk:1.6.2.16.2
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cpe:2.3:a:digium:asterisk:1.6.2.17
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cpe:2.3:a:digium:asterisk:1.6.2.17.1
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cpe:2.3:a:digium:asterisk:1.6.2.17.2
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cpe:2.3:a:digium:asterisk:1.6.2.17.3
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cpe:2.3:a:digium:asterisk:1.6.2.18
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cpe:2.3:a:digium:asterisk:1.6.2.18.1
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cpe:2.3:a:digium:asterisk:1.6.2.18.2
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cpe:2.3:a:digium:asterisk:1.6.2.2
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cpe:2.3:a:digium:asterisk:1.6.2.3
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cpe:2.3:a:digium:asterisk:1.6.2.4
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cpe:2.3:a:digium:asterisk:1.6.2.5
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cpe:2.3:a:digium:asterisk:1.6.2.6