{"id":"ALPINE-CVE-2024-42491","details":"Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations.","modified":"2026-09-15T08:17:48.474898825Z","published":"2024-09-05T18:15:05.707Z","upstream":["CVE-2024-42491"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2024-42491"}],"affected":[{"package":{"name":"asterisk","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"18.24.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"18.24.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"20.9.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"20.9.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"20.9.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"20.9.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"20.9.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}},{"package":{"name":"asterisk","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/asterisk?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"20.0.0"},{"fixed":"20.9.3-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2024-42491.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H"}]}