CVE-2009-0871

Severity: low (CVSS 3.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-03-11 · updated 2026-06-16
Weakness: CWE-20

Description

The SIP channel driver in Asterisk Open Source 1.4.22, 1.4.23, and 1.4.23.1; 1.6.0 before 1.6.0.6; 1.6.1 before 1.6.1.0-rc2; and Asterisk Business Edition C.2.3, with the pedantic option enabled, allows remote authenticated users to cause a denial of service (crash) via a SIP INVITE request without any headers, which triggers a NULL pointer dereference in the (1) sip_uri_headers_cmp and (2) sip_uri_params_cmp functions.

Affected products

Digium Asterisk: 1.4.22, 1.4.23, 1.4.23.1, 1.6.0, 1.6.0-beta1, 1.6.0-beta2 (+24)

References

http://bugs.digium.com/view.php?id=13547
http://bugs.digium.com/view.php?id=14417
http://downloads.digium.com/pub/security/AST-2009-002.html
http://osvdb.org/52568
http://secunia.com/advisories/34229
http://www.securityfocus.com/archive/1/501656/100/0/threaded
http://www.securityfocus.com/bid/34070
http://www.securitytracker.com/id?1021834
http://www.vupen.com/english/advisories/2009/0667
http://bugs.digium.com/view.php?id=13547
http://bugs.digium.com/view.php?id=14417
http://downloads.digium.com/pub/security/AST-2009-002.html

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