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 cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Asterisk Open Source=1.4.22
Asterisk Open Source=1.4.23-rc1
Asterisk Open Source=1.2.4-netsec
Asterisk Open Source=1.2.8
Asterisk Open Source=1.2.16-netsec
Asterisk Open Source=1.6.0-rc4
Asterisk Open Source=1.6.0-beta7
Asterisk Opensource=1.4.23.1
Asterisk Open Source=1.2.30.2
Asterisk Open Source=1.4.19.1
Asterisk Open Source=1.4.19_rc3
Asterisk Open Source=1.4.19-rc2
Asterisk Open Source=1.2.20-netsec
Asterisk Open Source=1.6.0-rc5
Asterisk Open Source=1.4.23-rc2
Asterisk Open Source=1.2.12-netsec
Asterisk Open Source=1.2.19-netsec
Asterisk Open Source=1.2.15
Asterisk Open Source=1.2.9.1-netsec
Asterisk Open Source=1.2.27
Asterisk Open Source=1.4.9
Asterisk Open Source=1.4.20-rc2
Asterisk Open Source=1.4.10
Asterisk Open Source=1.4.6
Asterisk Open Source=1.2.14-netsec
Asterisk Open Source=1.2.3
Asterisk Open Source=1.2.23
Asterisk Open Source=1.2.0-beta2
Asterisk Open Source=1.6.0-beta5
Asterisk Open Source=1.2.26.2-netsec
Asterisk Open Source=1.4.0
Asterisk Open Source=1.4.20
Asterisk Open Source=1.2.26.1
Asterisk Open Source=1.4.15
Asterisk Open Source=1.6.1
Asterisk Open Source=1.4beta
Asterisk Open Source=1.4.21.1
Asterisk Open Source=1.2.13-netsec
Asterisk Open Source=1.4.21-rc2
Asterisk Open Source=1.6.0.1
Asterisk Open Source=1.2.25-netsec
Asterisk Open Source=1.2.0-rc2
Asterisk Open Source=1.2.1
Asterisk Open Source=1.2.26-netsec
Asterisk Open Source=1.6.0-beta7.1
Asterisk Open Source=1.4.19-rc3
Asterisk Open Source=1.6.0-rc6
Asterisk Business Edition=c.3.0
Asterisk Open Source=1.2.24
Asterisk Open Source=1.6.0-beta1
Asterisk Open Source=1.4.12.1
Asterisk Open Source=1.4.12
Asterisk Open Source=1.4.19-rc4
Asterisk Open Source=1.2.9.1
Asterisk Open Source=1.2.30.4
Asterisk Open Source=1.4.16.2
Asterisk Open Source=1.4.13
Asterisk Open Source=1.2.0
Asterisk Open Source=1.2.25
Asterisk Open Source=1.2.3-netsec
Asterisk Open Source=1.2.18-netsec
Asterisk Open Source=1.2.10-netsec
Asterisk Open Source=1.2.11
Asterisk Open Source=1.4.10.1
Asterisk Open Source=1.2.12
Asterisk Open Source=1.4.18.1
Asterisk Open Source=1.2.7.1-netsec
Asterisk Open Source=1.2.13
Asterisk Open Source=1.4.2
Asterisk Open Source=1.2.2
Asterisk Open Source=1.2.6-netsec
Asterisk Open Source=1.4.1
Asterisk Open Source=1.2.5
Asterisk Open Source=1.6.0.3-rc1
Asterisk Open Source=1.6.0-beta3
Asterisk Open Source=1.6.0-beta2
Asterisk Open Source=1.2.26
Asterisk Open Source=1.4.0-beta4
Asterisk Open Source=1.2.24-netsec
Asterisk Open Source=1.4.20-rc3
Asterisk Open Source=1.4.11
Asterisk Open Source=1.2.21
Asterisk Open Source=1.4.3
Asterisk Open Source=1.2.21-netsec
Asterisk Open Source=1.4.7
Asterisk Open Source=1.2.0-rc1
Asterisk Open Source=1.6.0-beta8
Asterisk Open Source=1.4.19-rc-2
Asterisk Open Source=1.4.22-rc3
Asterisk Opensource=1.4.22
Asterisk Open Source=1.2.11-netsec
Asterisk Open Source=1.4.4
Asterisk Open Source=1.4.7.1
Asterisk Open Source=1.2.26.2
Asterisk Open Source=1.4.0-beta2
Asterisk Open Source=1.2.7
Asterisk Business Edition=c.2.3
Asterisk Open Source=1.4.22.2
Asterisk Open Source=1.2.10
Asterisk Open Source=1.2.17
Asterisk Open Source=1.4.5
Asterisk Open Source=1.4.23
Asterisk Open Source=1.2.7.1
Asterisk Open Source=1.2.7-netsec
Asterisk Open Source=1.2.30
Asterisk Open Source=1.2.17-netsec
Asterisk Open Source=1.2.20
Asterisk Open Source=1.2.4
Asterisk Open Source=1.4.0-beta3
Asterisk Open Source=1.4.22.1
Asterisk Open Source=1.4.18
Asterisk Open Source=1.2.15-netsec
Asterisk Open Source=1.2.22
Asterisk Business Edition=b.1.3.2
Asterisk Open Source=1.4.19.2
Asterisk Open Source=1.6.0-beta9
Asterisk Open Source=1.2.5-netsec
Asterisk Open Source=1.2.30.3
Asterisk Open Source=1.2.2-netsec
Asterisk Open Source=1.4.16
Asterisk Open Source=1.6.0.3
Asterisk Open Source=1.4.14
Asterisk Open Source=1.2.0-beta1
Asterisk Open Source=1.2.16
Asterisk Open Source=1.6.0-beta4
Asterisk Open Source=1.2.12.1
Asterisk Open Source=1.6.0.2
Asterisk Open Source=1.4.23-rc3
Asterisk Open Source=1.4.16.1
Asterisk Open Source=1.4.21-rc1
Asterisk Open Source=1.4.21
Asterisk Open Source=1.2.21.1
Asterisk Open Source=1.2.8-netsec
Asterisk Open Source=1.2.26.1-netsec
Asterisk Open Source=1.4.21.2
Asterisk Open Source=1.2.19
Asterisk Open Source=1.4.19-rc1
Asterisk Open Source=1.4.20-rc1
Asterisk Open Source=1.2.12.1-netsec
Asterisk Open Source=1.2.28
Asterisk Open Source=1.4.19
Asterisk Opensource=1.4.23
Asterisk Open Source=1.2.21.1-netsec
Asterisk Open Source=1.4.8
Asterisk Open Source=1.4.17
Asterisk Open Source=1.2.6
Asterisk Open Source=1.4.22-rc4
Asterisk Open Source=1.2.18
Asterisk Open Source=1.2.22-netsec
Asterisk Open Source=1.2.23-netsec
Asterisk Appliance s800i=1.3.0.2
Asterisk Open Source=1.2.29
Digium Asterisk<b.2.5.9
Digium Asterisk>=c.2.0<=c.2.4.1
Digium Asterisk>=c.3.0<c.3.1
All of
Digium S800i Firmware>=1.2.0<1.3.0.3
Digium S800i
Digium Asterisk>=1.2.0<1.2.34
Digium Asterisk>=1.4.0<1.4.26.1
Digium Asterisk>=1.6.0<1.6.0.12
Digium Asterisk>=1.6.1<1.6.1.4

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203