{"id":"CVE-2015-3455","url":"https://www.cyber-defence.io/tools/cve/CVE-2015-3455","generatedAt":"2026-11-05T06:17:12.441Z","title":"Squid 3.2.x before 3.2.14, 3.3.x before 3.3.14, 3.4.x before 3.4.13, and 3.5.x before 3.5.4, when configured with client-first SSL-bump, do not properly validate the domain or hostname fields of X.509 certificates, which allows man-in-the-middle…","description":"Squid 3.2.x before 3.2.14, 3.3.x before 3.3.14, 3.4.x before 3.4.13, and 3.5.x before 3.5.4, when configured with client-first SSL-bump, do not properly validate the domain or hostname fields of X.509 certificates, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate.","published":"2015-05-18T15:59:12.000Z","lastModified":"2026-06-17T00:25:57.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":2.6,"severity":"LOW","vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N"},"cwe":["CWE-20"],"affected":["oracle/linux","oracle/solaris","squid-cache/squid","fedoraproject/fedora"],"epss":{"score":0.11402,"percentile":0.96011,"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 11.4%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://advisories.mageia.org/MGASA-2015-0191.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-09/msg00016.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html","source":"cve@mitre.org"},{"url":"http://rhn.redhat.com/errata/RHSA-2015-2378.html","source":"cve@mitre.org"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2015:230","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/74438","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1032221","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.squid-cache.org/Advisories/SQUID-2015_1.txt","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://advisories.mageia.org/MGASA-2015-0191.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2015-09/msg00016.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2015-2378.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2015:230","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/74438","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1032221","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.squid-cache.org/Advisories/SQUID-2015_1.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2015-3455","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."}