{"id":"UBUNTU-CVE-2023-27598","details":"OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, sending a malformed `Via` header to OpenSIPS triggers a segmentation fault when the function `calc_tag_suffix` is called. A specially crafted `Via` header, which is deemed correct by the parser, will pass uninitialized strings to the function `MD5StringArray` which leads to the crash. Abuse of this vulnerability leads to Denial of Service due to a crash. Since the uninitialized string points to memory location `0x0`, no further exploitation appears to be possible. No special network privileges are required to perform this attack, as long as the OpenSIPS configuration makes use of functions such as `sl_send_reply` or `sl_gen_totag` that trigger the vulnerable code. This issue has been fixed in versions 3.1.7 and 3.2.4.","modified":"2025-10-24T05:01:52Z","published":"2023-03-15T21:15:00Z","upstream":["CVE-2023-27598"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-27598"},{"type":"REPORT","url":"https://github.com/OpenSIPS/opensips/commit/ab611f74f69d9c42be5401c40d56ea06a58f5dd7"},{"type":"REPORT","url":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-wxfg-3gwh-rhvx"},{"type":"REPORT","url":"https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-27598"}],"affected":[{"package":{"name":"opensips","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/opensips@2.2.2-3build4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.2-3build2","2.2.2-3build3","2.2.2-3build4"],"ecosystem_specific":{"binaries":[{"binary_name":"opensips","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-b2bua-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-berkeley-bin","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-berkeley-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-carrierroute-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-compression-module","binary_version":"2.2.2-3build4"},{"binary_version":"2.2.2-3build4","binary_name":"opensips-console"},{"binary_name":"opensips-cpl-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-dbhttp-module","binary_version":"2.2.2-3build4"},{"binary_version":"2.2.2-3build4","binary_name":"opensips-dialplan-module"},{"binary_name":"opensips-emergency-module","binary_version":"2.2.2-3build4"},{"binary_version":"2.2.2-3build4","binary_name":"opensips-geoip-module"},{"binary_name":"opensips-http-modules","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-identity-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-jabber-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-json-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-ldap-modules","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-lua-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-memcached-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-mysql-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-perl-modules","binary_version":"2.2.2-3build4"},{"binary_version":"2.2.2-3build4","binary_name":"opensips-postgres-module"},{"binary_name":"opensips-presence-modules","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-rabbitmq-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-radius-modules","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-redis-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-regex-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-restclient-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-sctp-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-snmpstats-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-sqlite-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-tls-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-tlsmgm-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-unixodbc-module","binary_version":"2.2.2-3build4"},{"binary_name":"opensips-wss-module","binary_version":"2.2.2-3build4"},{"binary_version":"2.2.2-3build4","binary_name":"opensips-xmlrpc-module"},{"binary_name":"opensips-xmpp-module","binary_version":"2.2.2-3build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-27598.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}