{"id":"UBUNTU-CVE-2018-16657","details":"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.","modified":"2026-02-04T02:16:30.100726Z","published":"2018-09-07T14:29:00Z","related":["USN-6022-1"],"upstream":["CVE-2018-16657"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-16657"},{"type":"REPORT","url":"https://skalatan.de/blog/advisory-hw-2018-06"},{"type":"REPORT","url":"https://github.com/kamailio/kamailio/commit/ad68e402ece8089f133c10de6ce319f9e28c0692"},{"type":"REPORT","url":"https://github.com/kamailio/kamailio/commit/d67b2f9874ca23bd69f18df71b8f53b1b6151f6d"},{"type":"REPORT","url":"https://github.com/kamailio/kamailio/commit/f07dabffef98c7088cdbc2bd695a4ae7a241b159"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6022-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-16657"}],"affected":[{"package":{"name":"kamailio","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/kamailio@4.3.4-1.1ubuntu2.1+esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.4-1.1ubuntu2.1+esm1"}]}],"versions":["4.3.1-2ubuntu1","4.3.4-1.1ubuntu1","4.3.4-1.1ubuntu2","4.3.4-1.1ubuntu2.1"],"ecosystem_specific":{"availability":"Available 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