OpenSIPS up to 3.1.6/3.2.3 Header data_lump.c append_hf To denial of service

Summaryinfo

A vulnerability marked as problematic has been reported in OpenSIPS up to 3.1.6/3.2.3. This vulnerability affects the function append_hf of the file data_lump.c of the component Header Handler. This manipulation of the argument To causes denial of service. This vulnerability is handled as CVE-2023-27599. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSIPS up to 3.1.6/3.2.3. It has been declared as critical. Affected by this vulnerability is the function append_hf of the file data_lump.c of the component Header Handler. The manipulation of the argument To with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, when the function `append_hf` handles a SIP message with a malformed To header, a call to the function `abort()` is performed, resulting in a crash. This is due to the following check in `data_lump.c:399` in the function `anchor_lump`. An attacker abusing this vulnerability will crash OpenSIPS leading to Denial of Service. It affects configurations containing functions that make use of the affected code, such as the function `append_hf`. This issue has been fixed in versions 3.1.7 and 3.2.4.

The weakness was released 03/16/2023 as GHSA-qvj2-vqrg-f5jx. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-27599 since 03/04/2023. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 3.1.7 or 3.2.4 eliminates this vulnerability. Applying the patch cb56694d290530ac308f44b453c18120b1c1109d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• OpenSIPS

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.1.5
• 3.1.6
• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3

License

• open-source

Website

• Product: https://github.com/OpenSIPS/opensips/

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CPE 2.2info

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