{"id":"DEBIAN-CVE-2023-49288","details":"Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with \"collapsed_forwarding on\" are vulnerable. Configurations with \"collapsed_forwarding off\" or without a \"collapsed_forwarding\" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.","modified":"2026-09-15T09:02:44.176465267Z","published":"2023-12-04T23:15:27.477Z","upstream":["CVE-2023-49288"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-49288"}],"affected":[{"package":{"name":"squid","ecosystem":"Debian:12","purl":"pkg:deb/debian/squid?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.7-2","5.7-2+deb12u1","5.7-2+deb12u2","5.7-2+deb12u3","5.7-2+deb12u4","5.7-2+deb12u5","5.7-2+deb12u6","6.1-1","6.1-2","6.10-1","6.12-1","6.13-1","6.13-2","6.3-1","6.5-1","6.6-1","6.8-1","6.9-1","7.1-1","7.2-1","7.2-2","7.4-1","7.5-1","7.6-1","7.6-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-49288.json"}},{"package":{"name":"squid","ecosystem":"Debian:13","purl":"pkg:deb/debian/squid?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-49288.json"}},{"package":{"name":"squid","ecosystem":"Debian:14","purl":"pkg:deb/debian/squid?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-49288.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}