CVE-2018-16657

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with an invalid Via header causes a segmentation fault and crashes Kamailio. The reason is missing input validation in the crcitt_string_array core function for calculating a CRC hash for To tags. (An additional error is present in the check_via_address core function: this function also misses input validation.) This could result in denial of service and potentially the execution of arbitrary code.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-476

Affected software

No affected versions have been published.

Timeline

Published
Sep 7, 2018
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2018-16657: Critical severity, CVSS 9.8 | Vulnix