{"id":"CVE-2018-1172","details":"This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability. The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition to users of the system. Was ZDI-CAN-6088.","modified":"2026-07-08T14:14:07.903792Z","published":"2018-05-16T21:29:00.280Z","related":["SUSE-SU-2018:1122-1","SUSE-SU-2018:1365-1","openSUSE-SU-2024:11403-1"],"references":[{"type":"ADVISORY","url":"http://www.squid-cache.org/Advisories/SQUID-2018_3.txt"},{"type":"ADVISORY","url":"https://zerodayinitiative.com/advisories/ZDI-18-309"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/squid-cache/squid","events":[{"introduced":"c321737de30e69b0d31944b8962eccd4e88b7267"},{"last_affected":"c321737de30e69b0d31944b8962eccd4e88b7267"}],"database_specific":{"cpe":"cpe:2.3:a:squid-cache:squid:3.5.27:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.5.27"},{"last_affected":"3.5.27"}],"source":"CPE_STRING"}}],"versions":["3.5.27","SQUID_3_5_27","M-staged-PR264"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1172.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}