A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
History

Tue, 04 Nov 2025 22:30:00 +0000


Mon, 03 Nov 2025 23:15:00 +0000

Type Values Removed Values Added
Description A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way. A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
References

Wed, 29 Oct 2025 09:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 28 Oct 2025 15:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:*

Tue, 28 Oct 2025 14:30:00 +0000

Type Values Removed Values Added
References

Tue, 28 Oct 2025 01:30:00 +0000

Type Values Removed Values Added
References

Mon, 27 Oct 2025 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Kamailio
Kamailio kamailio
Vendors & Products Kamailio
Kamailio kamailio

Mon, 27 Oct 2025 03:15:00 +0000

Type Values Removed Values Added
Description A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Title Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference
Weaknesses CWE-404
CWE-476
References
Metrics cvssV2_0

{'score': 1.7, 'vector': 'AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 3.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2025-10-27T02:32:17.604Z

Updated: 2025-11-04T21:09:31.867Z

Reserved: 2025-10-25T11:52:20.560Z

Link: CVE-2025-12207

cve-icon Vulnrichment

Updated: 2025-11-04T21:09:31.867Z

cve-icon NVD

Status : Modified

Published: 2025-10-27T03:15:49.937

Modified: 2025-11-04T22:16:06.180

Link: CVE-2025-12207

cve-icon Redhat

No data.