{"id":"CVE-2019-18677","details":"An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.","modified":"2026-05-18T05:52:05.952175635Z","published":"2019-11-26T17:15:12.923Z","related":["ALSA-2020:4743","SUSE-SU-2019:2975-1","SUSE-SU-2019:3067-1","SUSE-SU-2020:0661-1","SUSE-SU-2020:14460-1","openSUSE-SU-2019:2540-1","openSUSE-SU-2019:2541-1","openSUSE-SU-2024:11403-1"],"database_specific":{"unresolved_ranges":[{"vendor_product":"canonical:ubuntu_linux","source":"CPE_FIELD","cpes":["cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"16.04"},{"last_affected":"18.04"},{"last_affected":"19.04"},{"last_affected":"19.10"}]},{"source":"CPE_FIELD","vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"30"},{"last_affected":"31"}]},{"vendor_product":"squid-cache:squid","source":"CPE_FIELD","cpes":["cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable2:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable3:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable4:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable5:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable6:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable7:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable8:*:*:*:*:*:*","cpe:2.3:a:squid-cache:squid:2.7:stable9:*:*:*:*:*:*"],"extracted_events":[{"introduced":"2.0"},{"last_affected":"2.7"},{"last_affected":"2.7-stable2"},{"last_affected":"2.7-stable3"},{"last_affected":"2.7-stable4"},{"last_affected":"2.7-stable5"},{"last_affected":"2.7-stable6"},{"last_affected":"2.7-stable7"},{"last_affected":"2.7-stable8"},{"last_affected":"2.7-stable9"}]}]},"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/"},{"type":"ADVISORY","url":"http://www.squid-cache.org/Advisories/SQUID-2019_9.txt"},{"type":"ADVISORY","url":"http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-e5f1813a674848dde570f7920873e1071f96e0b4.patch"},{"type":"ADVISORY","url":"http://www.squid-cache.org/Versions/v4/changesets/squid-4-36492033ea4097821a4f7ff3ddcb971fbd1e8ba0.patch"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4213-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4682"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=1156328"},{"type":"FIX","url":"https://github.com/squid-cache/squid/pull/427"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/squid-cache/squid","events":[{"introduced":"0"},{"last_affected":"6cfeb300caf423ff49a0511d8bd43a56f3418273"},{"last_affected":"fede82b3e7aa1f12a91bade17f6ac0d4c7463e0a"}],"database_specific":{"source":"CPE_FIELD","cpe":"cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.0"},{"last_affected":"3.5.28"},{"introduced":"4.0"},{"last_affected":"4.8"}]}}],"versions":["SQUID_4_8","SQUID_4_7","SQUID_4_6","SQUID_4_5","SQUID_4_4","SQUID_3_5_28","SQUID_4_3","SQUID_4_2","SQUID_4_1","SQUID_4_0_25","SQUID_4_0_24","SQUID_4_0_23","SQUID_4_0_22","SQUID_4_0_21","SQUID_3_5_26","SQUID_4_0_20","SQUID_3_5_25","SQUID_4_0_19","SQUID_3_5_24","SQUID_4_0_18","SQUID_3_5_23","SQUID_4_0_17","SQUID_4_0_16","SQUID_3_5_22","SQUID_4_0_15","SQUID_3_5_21","SQUID_4_0_14","SQUID_4_0_13","SQUID_3_5_20","SQUID_4_0_12","SQUID_4_0_11","SQUID_3_5_19","SQUID_4_0_10","SQUID_3_5_18","SQUID_3_5_17","SQUID_4_0_9","SQUID_3_5_16","SQUID_4_0_8","SQUID_3_5_15","SQUID_4_0_7","SQUID_3_5_14","SQUID_4_0_6","SQUID_4_0_5","SQUID_3_5_13","SQUID_4_0_4","SQUID_3_5_12","SQUID_4_0_3","SQUID_3_5_11","SQUID_4_0_2","SQUID_4_0_1","SQUID_3_5_10","SQUID_3_5_9","SQUID_3_5_8","SQUID_3_5_7","SQUID_3_5_6","SQUID_3_5_5","SQUID_3_5_4","SQUID_3_5_3","SQUID_3_5_2","SQUID_3_5_1","SQUID_3_5_0_4","SQUID_3_5_0_3","SQUID_3_5_0_2","SQUID_3_5_0_1","take00","SQUID_3_0_RC1","SQUID_3_0_PRE7","SQUID_3_0_PRE6","SQUID_3_0_PRE5","SQUID_3_0_PRE4","SQUID_3_0_PRE3","SQUID_3_0_PRE2","SQUID_3_0_PRE1","HISTORIC_RELEASES"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-18677.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}