high
7.8
CWE
399 770
Advisory Published
Updated

CVE-2009-2726

First published: Wed Aug 12 2009(Updated: )

The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Asterisk<b.2.5.9
Asterisk>=c.2.0<=c.2.4.1
Asterisk>=c.3.0<c.3.1
All of
digium s800i firmware>=1.2.0<1.3.0.3
digium s800i
Asterisk>=1.2.0<1.2.34
Asterisk>=1.4.0<1.4.26.1
Asterisk>=1.6.0<1.6.0.12
Asterisk>=1.6.1<1.6.1.4
Asterisk=1.4.22
Asterisk=1.4.23-rc1
Asterisk=1.2.4-netsec
Asterisk=1.2.8
Asterisk=1.2.16-netsec
Asterisk=1.6.0-rc4
Asterisk=1.6.0-beta7
Asterisk=1.4.23.1
Asterisk=1.2.30.2
Asterisk=1.4.19.1
Asterisk=1.4.19_rc3
Asterisk=1.4.19-rc2
Asterisk=1.2.20-netsec
Asterisk=1.6.0-rc5
Asterisk=1.4.23-rc2
Asterisk=1.2.12-netsec
Asterisk=1.2.19-netsec
Asterisk=1.2.15
Asterisk=1.2.9.1-netsec
Asterisk=1.2.27
Asterisk=1.4.9
Asterisk=1.4.20-rc2
Asterisk=1.4.10
Asterisk=1.4.6
Asterisk=1.2.14-netsec
Asterisk=1.2.3
Asterisk=1.2.23
Asterisk=1.2.0-beta2
Asterisk=1.6.0-beta5
Asterisk=1.2.26.2-netsec
Asterisk=1.4.0
Asterisk=1.4.20
Asterisk=1.2.26.1
Asterisk=1.4.15
Asterisk=1.6.1
Asterisk=1.4beta
Asterisk=1.4.21.1
Asterisk=1.2.13-netsec
Asterisk=1.4.21-rc2
Asterisk=1.6.0.1
Asterisk=1.2.25-netsec
Asterisk=1.2.0-rc2
Asterisk=1.2.1
Asterisk=1.2.26-netsec
Asterisk=1.6.0-beta7.1
Asterisk=1.4.19-rc3
Asterisk=1.6.0-rc6
Asterisk Business Edition=c.3.0
Asterisk=1.2.24
Asterisk=1.6.0-beta1
Asterisk=1.4.12.1
Asterisk=1.4.12
Asterisk=1.4.19-rc4
Asterisk=1.2.9.1
Asterisk=1.2.30.4
Asterisk=1.4.16.2
Asterisk=1.4.13
Asterisk=1.2.0
Asterisk=1.2.25
Asterisk=1.2.3-netsec
Asterisk=1.2.18-netsec
Asterisk=1.2.10-netsec
Asterisk=1.2.11
Asterisk=1.4.10.1
Asterisk=1.2.12
Asterisk=1.4.18.1
Asterisk=1.2.7.1-netsec
Asterisk=1.2.13
Asterisk=1.4.2
Asterisk=1.2.2
Asterisk=1.2.6-netsec
Asterisk=1.4.1
Asterisk=1.2.5
Asterisk=1.6.0.3-rc1
Asterisk=1.6.0-beta3
Asterisk=1.6.0-beta2
Asterisk=1.2.26
Asterisk=1.4.0-beta4
Asterisk=1.2.24-netsec
Asterisk=1.4.20-rc3
Asterisk=1.4.11
Asterisk=1.2.21
Asterisk=1.4.3
Asterisk=1.2.21-netsec
Asterisk=1.4.7
Asterisk=1.2.0-rc1
Asterisk=1.6.0-beta8
Asterisk=1.4.19-rc-2
Asterisk=1.4.22-rc3
Asterisk=1.4.22
Asterisk=1.2.11-netsec
Asterisk=1.4.4
Asterisk=1.4.7.1
Asterisk=1.2.26.2
Asterisk=1.4.0-beta2
Asterisk=1.2.7
Asterisk Business Edition=c.2.3
Asterisk=1.4.22.2
Asterisk=1.2.10
Asterisk=1.2.17
Asterisk=1.4.5
Asterisk=1.4.23
Asterisk=1.2.7.1
Asterisk=1.2.7-netsec
Asterisk=1.2.30
Asterisk=1.2.17-netsec
Asterisk=1.2.20
Asterisk=1.2.4
Asterisk=1.4.0-beta3
Asterisk=1.4.22.1
Asterisk=1.4.18
Asterisk=1.2.15-netsec
Asterisk=1.2.22
Asterisk Business Edition=b.1.3.2
Asterisk=1.4.19.2
Asterisk=1.6.0-beta9
Asterisk=1.2.5-netsec
Asterisk=1.2.30.3
Asterisk=1.2.2-netsec
Asterisk=1.4.16
Asterisk=1.6.0.3
Asterisk=1.4.14
Asterisk=1.2.0-beta1
Asterisk=1.2.16
Asterisk=1.6.0-beta4
Asterisk=1.2.12.1
Asterisk=1.6.0.2
Asterisk=1.4.23-rc3
Asterisk=1.4.16.1
Asterisk=1.4.21-rc1
Asterisk=1.4.21
Asterisk=1.2.21.1
Asterisk=1.2.8-netsec
Asterisk=1.2.26.1-netsec
Asterisk=1.4.21.2
Asterisk=1.2.19
Asterisk=1.4.19-rc1
Asterisk=1.4.20-rc1
Asterisk=1.2.12.1-netsec
Asterisk=1.2.28
Asterisk=1.4.19
Asterisk=1.4.23
Asterisk=1.2.21.1-netsec
Asterisk=1.4.8
Asterisk=1.4.17
Asterisk=1.2.6
Asterisk=1.4.22-rc4
Asterisk=1.2.18
Asterisk=1.2.22-netsec
Asterisk=1.2.23-netsec
Digium Asterisk s800i Appliance=1.3.0.2
Asterisk=1.2.29

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2009-2726?

    CVE-2009-2726 is classified as a medium severity vulnerability that allows for potential remote access to the system.

  • How do I fix CVE-2009-2726?

    To fix CVE-2009-2726, upgrade your Asterisk software to versions 1.2.34, 1.4.26.1, 1.6.0.12, or 1.6.1.4 or later.

  • What systems are affected by CVE-2009-2726?

    CVE-2009-2726 affects Asterisk Open Source versions prior to 1.2.34, 1.4.26.1, 1.6.0.12, and 1.6.1.4, as well as several versions of Asterisk Business Edition and Digium s800i firmware.

  • Is CVE-2009-2726 exploitable remotely?

    Yes, CVE-2009-2726 can be exploited remotely, allowing attackers to potentially gain unauthorized access.

  • Have there been any patches for CVE-2009-2726?

    Yes, patches for CVE-2009-2726 have been released in the form of updates to the affected Asterisk versions.

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