{"id":"CVE-2012-2213","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-2213","generatedAt":"2026-11-05T08:21:28.807Z","title":"Squid 3.1.9 allows remote attackers to bypass the access configuration for the CONNECT method by providing an arbitrary allowed hostname in the Host HTTP header.","description":"Squid 3.1.9 allows remote attackers to bypass the access configuration for the CONNECT method by providing an arbitrary allowed hostname in the Host HTTP header.  NOTE: this issue might not be reproducible, because the researcher is unable to provide a squid.conf file for a vulnerable system, and the observed behavior is consistent with a squid.conf file that was (perhaps inadvertently) designed to allow access based on a \"req_header Host\" acl regex that matches www.uol.com.br","published":"2012-04-28T10:06:13.000Z","lastModified":"2026-06-16T23:41:12.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N"},"cwe":["CWE-264"],"affected":["squid-cache/squid"],"epss":{"score":0.1218,"percentile":0.96174,"date":"2026-11-04","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 12.2%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0117.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0131.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0140.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0146.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0163.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0165.html","source":"cve@mitre.org"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0117.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0131.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0140.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0146.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0163.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://archives.neohapsis.com/archives/bugtraq/2012-04/0165.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-2213","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}