CVE-2025-12206

Description

A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. 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.

CVSS v3.1 Score

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-404 CWE-404

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
kamailio	kamailio	All

References

Exploits

https://shimo.im/docs/aBAYMVMB2jUP9jAj/ https://shimo.im/docs/aBAYMVMB2jUP9jAj

Other References

https://vuldb.com/?ctiid.329876 https://vuldb.com/?id.329876 https://vuldb.com/?submit.673240 https://www.openwall.com/lists/oss-security/2025/11/02/3 http://www.openwall.com/lists/oss-security/2025/10/27/12 http://www.openwall.com/lists/oss-security/2025/10/27/8 https://www.openwall.com/lists/oss-security/2025/10/27/8

Frequently Asked Questions

What is CVE-2025-12206? +

A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. 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. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2025-12206? +

CVE-2025-12206 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-12206? +

CVE-2025-12206 affects products from kamailio, specifically: kamailio. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-12206? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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