Unrated severityNVD Advisory· Published Jul 6, 2011· Updated Apr 29, 2026

CVE-2011-2536

Description

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests.

Affected products

198

Digium/Asterisk198 versions
cpe:2.3:a:digium:asterisk:1.4.0:*:*:*:*:*:*:*+ 197 more
- cpe:2.3:a:digium:asterisk:1.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.10:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.10.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.11:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.12:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.12.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.13:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.14:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.15:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.16:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.16.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.16.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.17:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.18:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.19:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.20:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.20.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.20:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.20:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.20:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.21:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.21.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.21.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.21:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.21:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.22:rc5:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.23:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.24:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.24.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.24:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.25:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.25.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.25:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:rc5:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.26:rc6:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.27:rc5:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.28:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.28:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.29:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.29.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.29:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.30:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.30:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.30:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.31:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.31:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.31:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.32:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.32:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.33:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.33.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.33:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.33:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.34:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.34:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.34:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.35:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.35:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.36:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.36:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.37:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.37:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.38:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.38:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.39:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.39.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.39.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.39:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.4:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.40:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.40.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.40.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.40:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.40:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.40:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.41:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.41.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.41:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.5:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.6:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.7:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.7.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.8:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.4.9:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc5:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc6:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc7:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.0:rc8:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.15:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.16:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.16.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.16.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.16:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.17:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.18:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.18.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.18:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.1:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.3:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.4:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.5:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.6:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.6:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.6.2.6:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:beta3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:beta4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:beta5:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.0:rc5:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.1.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.1.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.1:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.2.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.2.4:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.3:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4.2:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4.3:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4:rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4:rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:1.8.4:rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.0:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.1.0:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.1.1:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.2.2:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.2.3:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.3.2:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.6.2:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.6.3:-:business:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:c.3.6.4:-:business:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

downloads.asterisk.org/pub/security/AST-2011-011-1.8.diffnvdPatch
downloads.asterisk.org/pub/security/AST-2011-011.htmlnvdVendor Advisory
www.securitytracker.com/idnvd

News mentions

No linked articles in our index yet.

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ransomware	0.000