NULL Pointer Dereference Affecting kamailio package, versions <5.1.4-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-KAMAILIO-19434972
- published31 Aug 2026
- disclosed7 Sept 2018
Introduced: 7 Sep 2018
CVE-2018-16657 (opens in a new tab)How to fix?
Upgrade Echo:latest kamailio to version 5.1.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kamailio package and not the kamailio package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.