A vulnerability was detected in Kamailio 5.5. The affected element is the function sr_push_yy_state of the file src/core/cfg.lex of the component Configuration File Handler. The manipulation results in use after free.
The attack must be initiated from a local position. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment.
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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Kamailio Kamailio
cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:*
|
— | — |
References 8
https://shimo.im/docs/ZzkLMVMLOzIRlpAQ/
cna@vuldb.com
https://vuldb.com/?ctiid.329875
cna@vuldb.com
https://vuldb.com/?id.329875
cna@vuldb.com
https://vuldb.com/?submit.673225
cna@vuldb.com
https://www.openwall.com/lists/oss-security/2025/11/02/3
cna@vuldb.com
http://www.openwall.com/lists/oss-security/2025/10/27/12
af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2025/10/27/8
af854a3a-2127-422b-91ae-364da2661108
https://www.openwall.com/lists/oss-security/2025/10/27/8
af854a3a-2127-422b-91ae-364da2661108