medium
5
CWE
200
Advisory Published
Updated

CVE-2011-2536: Infoleak

First published: Wed Jul 06 2011(Updated: )

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.

Credit: cve@mitre.org

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

Remedy

http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-2536?

    CVE-2011-2536 is classified as a medium severity vulnerability that can lead to security breaches in Asterisk.

  • How do I fix CVE-2011-2536?

    To fix CVE-2011-2536, upgrade Asterisk to version 1.4.41.2 or higher, 1.6.2.18.2 or higher, or 1.8.4.4 or higher.

  • What is the impact of CVE-2011-2536?

    CVE-2011-2536 can allow attackers to exploit differences in response behaviors, potentially leading to unauthorized access or information disclosure.

  • Which Asterisk versions are affected by CVE-2011-2536?

    CVE-2011-2536 affects Asterisk Open Source versions prior to 1.4.41.2, 1.6.2.18.2, and 1.8.4.4, as well as prior versions of Asterisk Business Edition.

  • Is CVE-2011-2536 related to SIP security?

    Yes, CVE-2011-2536 is related to SIP security issues within the Asterisk SIP channel driver.

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