CVE-2003-1109: The Session Initiation Protocol (SIP) implementation in multiple Cisco products including IP Phone models 7940 and 7960, IOS versions in the 12.2 trai...

Description

The Session Initiation Protocol (SIP) implementation in multiple Cisco products including IP Phone models 7940 and 7960, IOS versions in the 12.2 train, and Secure PIX 5.2.9 to 6.2.2 allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted INVITE messages, as demonstrated by the OUSPG PROTOS c07-sip test suite.

Metrics

EPSS Probability

6.79%

93.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.2\(1\)xa
Cisco	Ios	12.2\(1\)xd
Cisco	Ios	12.2\(1\)xd1
Cisco	Ios	12.2\(1\)xd3
Cisco	Ios	12.2\(1\)xd4
Cisco	Ios	12.2\(1\)xe
Cisco	Ios	12.2\(1\)xe2
Cisco	Ios	12.2\(1\)xe3
Cisco	Ios	12.2\(1\)xh
Cisco	Ios	12.2\(1\)xq
Cisco	Ios	12.2\(1\)xs
Cisco	Ios	12.2\(1\)xs1
Cisco	Ios	12.2\(2\)t4
Cisco	Ios	12.2\(2\)xa
Cisco	Ios	12.2\(2\)xa1
Cisco	Ios	12.2\(2\)xa5
Cisco	Ios	12.2\(2\)xb
Cisco	Ios	12.2\(2\)xb3
Cisco	Ios	12.2\(2\)xb4
Cisco	Ios	12.2\(2\)xf
Cisco	Ios	12.2\(2\)xg
Cisco	Ios	12.2\(2\)xh
Cisco	Ios	12.2\(2\)xh2
Cisco	Ios	12.2\(2\)xh3
Cisco	Ios	12.2\(2\)xi
Cisco	Ios	12.2\(2\)xi1
Cisco	Ios	12.2\(2\)xi2
Cisco	Ios	12.2\(2\)xj
Cisco	Ios	12.2\(2\)xj1
Cisco	Ios	12.2\(2\)xk
Cisco	Ios	12.2\(2\)xk2
Cisco	Ios	12.2\(2\)xn
Cisco	Ios	12.2\(2\)xt
Cisco	Ios	12.2\(2\)xt3
Cisco	Ios	12.2\(2\)xu
Cisco	Ios	12.2\(2\)xu2
Cisco	Ios	12.2\(11\)t
Cisco	Ios	12.2t
Cisco	Ios	12.2xa
Cisco	Ios	12.2xb
Cisco	Ios	12.2xc
Cisco	Ios	12.2xd
Cisco	Ios	12.2xe
Cisco	Ios	12.2xf
Cisco	Ios	12.2xg
Cisco	Ios	12.2xh
Cisco	Ios	12.2xi
Cisco	Ios	12.2xj
Cisco	Ios	12.2xk
Cisco	Ios	12.2xl

Showing 50 of 75 affected configurations. See NVD for the full list.

References

http://www.cert.org/advisories/CA-2003-06.htmlThird Party Advisory, US Government Resource
http://www.cisco.com/warp/public/707/cisco-sa-20030221-protos.shtmlPatch
http://www.ee.oulu.fi/research/ouspg/protos/testing/c07/sip/Exploit
http://www.kb.cert.org/vuls/id/528719Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/6904Patch
http://www.securitytracker.com/id?1006143
http://www.securitytracker.com/id?1006144
http://www.securitytracker.com/id?1006145
https://exchange.xforce.ibmcloud.com/vulnerabilities/11379
http://www.cert.org/advisories/CA-2003-06.htmlThird Party Advisory, US Government Resource
http://www.cisco.com/warp/public/707/cisco-sa-20030221-protos.shtmlPatch
http://www.ee.oulu.fi/research/ouspg/protos/testing/c07/sip/Exploit
http://www.kb.cert.org/vuls/id/528719Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/6904Patch
http://www.securitytracker.com/id?1006143
http://www.securitytracker.com/id?1006144
http://www.securitytracker.com/id?1006145
https://exchange.xforce.ibmcloud.com/vulnerabilities/11379

Timeline

Published: Dec 31, 2003
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2003-1109?

The Session Initiation Protocol (SIP) implementation in multiple Cisco products including IP Phone models 7940 and 7960, IOS versions in the 12.2 train, and Secure PIX 5.2.9 to 6.2.2 allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted INVITE messages, as demonstrated by the OUSPG PROTOS c07-sip test suite.

How severe is CVE-2003-1109?

Severity scoring for CVE-2003-1109 is pending analysis. The EPSS model estimates a 6.79% probability of exploitation in the next 30 days.

How do I fix CVE-2003-1109?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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