{"id":"CVE-2015-3455","aliases":["DEBIAN-CVE-2015-3455","EUVD-2015-3498","GHSA-5r9c-4h43-4v5m","MGASA-2015-0191","RHSA-2015:2378","SUSE-SU-2016:2008-1","UBUNTU-CVE-2015-3455"],"status":"published","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...","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.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.11402,"percentile":0.96026,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2015-05-05T13:36:50Z","modified":"2026-09-09T06:47:25Z","fixes":[{"ecosystem":"Debian:12","package":"squid","fixed_in":["4.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"squid","fixed_in":["4.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"squid","fixed_in":["4.1-1"],"sources":["osv"]},{"ecosystem":"Mageia:4","package":"squid","fixed_in":["3.3.14-1.mga4"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::server","package":"squid-debuginfo","fixed_in":["7:3.3.8-26.el7"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::server","package":"squid-sysvinit","fixed_in":["7:3.3.8-26.el7"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::server","package":"squid","fixed_in":["7:3.3.8-26.el7"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","package":"squid-debuginfo","fixed_in":["7:3.3.8-26.el7"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","package":"squid-sysvinit","fixed_in":["7:3.3.8-26.el7"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","package":"squid","fixed_in":["7:3.3.8-26.el7"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"squid3","fixed_in":["3.3.8-1ubuntu6.6"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1-1"}]}]},{"source":"osv","ecosystem":"Mageia:4","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.14-1.mga4"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:7::server","package":"squid-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.3.8-26.el7"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:7::server","package":"squid-sysvinit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.3.8-26.el7"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:7::server","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.3.8-26.el7"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:7::workstation","package":"squid-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.3.8-26.el7"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:7::workstation","package":"squid-sysvinit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.3.8-26.el7"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:7::workstation","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7:3.3.8-26.el7"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP1","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.14-20.2"}]}],"bundled":16},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP1","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.14-20.2"}]}],"bundled":16},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"squid3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.8-1ubuntu6.6"}]}],"versions":["3.3.8-1ubuntu3","3.3.8-1ubuntu4","3.3.8-1ubuntu5","3.3.8-1ubuntu6","3.3.8-1ubuntu6.1","3.3.8-1ubuntu6.2","3.3.8-1ubuntu6.3","3.3.8-1ubuntu6.4"]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"oracle","product":"linux"},{"vendor":"oracle","product":"solaris"},{"vendor":"squid-cache","product":"squid"}],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183598.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","Third Party Advisory","advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-2378.html","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred","advisory"]},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://lists.opensuse.org/opensuse-updates/2015-09/msg00016.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/74438","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.securitytracker.com/id/1032221","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://advisories.mageia.org/MGASA-2015-0191.html","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2015:230","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","Broken Link","advisory"]},{"url":"http://www.squid-cache.org/Advisories/SQUID-2015_1.txt","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-3455","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-5r9c-4h43-4v5m"},{"url":"https://security-tracker.debian.org/tracker/CVE-2015-3455","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2015-0191.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=15802","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2015:2378","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1102842","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1161600","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1198778","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1204375","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1218118","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1263338","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2015/rhsa-2015_2378.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2015-3455","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2015-3455","tags":["advisory","report"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20162008-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/902197","tags":["report"]},{"url":"https://bugzilla.suse.com/929493","tags":["report"]},{"url":"https://bugzilla.suse.com/938715","tags":["report"]},{"url":"https://bugzilla.suse.com/955783","tags":["report"]},{"url":"https://bugzilla.suse.com/959290","tags":["report"]},{"url":"https://bugzilla.suse.com/963539","tags":["report"]},{"url":"https://bugzilla.suse.com/968392","tags":["report"]},{"url":"https://bugzilla.suse.com/968393","tags":["report"]},{"url":"https://bugzilla.suse.com/968394","tags":["report"]},{"url":"https://bugzilla.suse.com/968395","tags":["report"]},{"url":"https://bugzilla.suse.com/973782","tags":["report"]},{"url":"https://bugzilla.suse.com/973783","tags":["report"]},{"url":"https://bugzilla.suse.com/976553","tags":["report"]},{"url":"https://bugzilla.suse.com/976556","tags":["report"]},{"url":"https://bugzilla.suse.com/979008","tags":["report"]},{"url":"https://bugzilla.suse.com/979009","tags":["report"]},{"url":"https://bugzilla.suse.com/979010","tags":["report"]},{"url":"https://bugzilla.suse.com/979011","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3455","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-5400","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2569","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2570","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2571","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2572","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-3947","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-3948","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4051","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4052","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4053","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4054","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4553","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4554","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4555","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4556","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2015-3455","tags":["report"]},{"url":"http://www.openwall.com/lists/oss-security/2015/04/30/2","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2015-3455","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.","status":"published","published":"2015-05-18T15:00:00Z","modified":"2024-08-06T05:47:57.745Z","updated_at":"2026-11-02T14:35:41.976732Z"}],"euvd":[{"id":"EUVD-2015-3498","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.","status":"published","published":"2015-05-18T15:00:00Z","modified":"2024-08-06T05:47:57Z","updated_at":"2026-11-03T02:22:07.516949Z"}],"ghsa":[{"id":"GHSA-5r9c-4h43-4v5m","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...","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.","status":"published","published":"2022-05-13T01:29:08Z","modified":"2023-02-01T05:07:51Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:50:37.729708Z"}],"nvd":[{"id":"CVE-2015-3455","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.","status":"published","published":"2015-05-18T15:59:11.65Z","modified":"2026-06-17T00:25:57.313Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:03:04.906059Z"}],"osv":[{"id":"CVE-2015-3455","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.","status":"published","published":"2015-05-18T15:59:11Z","modified":"2026-04-16T06:19:08.493904508Z","updated_at":"2026-11-02T15:44:00.594921Z"},{"id":"DEBIAN-CVE-2015-3455","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.","status":"published","published":"2015-05-18T15:59:11.65Z","modified":"2026-09-09T06:47:25.580642237Z","updated_at":"2026-11-02T15:45:26.752992Z"},{"id":"MGASA-2015-0191","title":"Updated squid packages fix CVE-2015-3455","description":"Updated squid packages fix security vulnerability:\n\nSquid configured with client-first SSL-bump does not correctly validate X509\nserver certificate domain / hostname fields (CVE-2015-3455).\n","status":"published","published":"2015-05-05T13:36:50Z","modified":"2026-04-16T06:25:43.842963334Z","updated_at":"2026-11-02T15:49:39.488462Z"},{"id":"RHSA-2015:2378","title":"Red Hat Security Advisory: squid security and bug fix update","status":"published","published":"2024-09-15T22:40:35Z","modified":"2026-06-27T10:03:30Z","updated_at":"2026-11-02T15:53:03.182161Z"},{"id":"SUSE-SU-2016:2008-1","title":"Security update for squid","description":"\nThe Squid HTTP proxy has been updated to version 3.3.14, fixing the following\nsecurity issues:\n\n- Fixed multiple Denial of Service issues in HTTP Response processing.\n  (CVE-2016-2569, CVE-2016-2570, CVE-2016-2571, CVE-2016-2572,\n   bsc#968392, bsc#968393, bsc#968394, bsc#968395)\n- CVE-2016-3947: Buffer overrun issue in pinger ICMPv6\n  processing. (bsc#973782)\n- CVE-2015-5400: Improper protection of alternate path. (bsc#938715)\n- CVE-2015-3455: Squid http proxy configured with client-first SSL\n  bumping did not correctly validate server certificate. (bsc#929493)\n- CVE-2016-3948: Fixed denial of service in HTTP Response processing\n  (bsc#973783)\n- CVE-2016-4051: fixes buffer overflow in cachemgr.cgi (bsc#976553)\n- CVE-2016-4052, CVE-2016-4053, CVE-2016-4054: Fixed multiple issues in\n  ESI processing (bsc#976556)\n- CVE-2016-4553: Fixed cache poisoning issue in HTTP Request handling (bsc#979009)\n- CVE-2016-4554: Fixed header smuggling issue in HTTP Request processing\n  (bsc#979010)\n- Fixed multiple Denial of Service issues in ESI Response processing.\n  (CVE-2016-4555, CVE-2016-4556, bsc#979011, bsc#979008)\n\nAdditionally, the following non-security issues have been fixed:\n\n- Fix header size in script unsquid.pl. (bsc#902197)\n- Add external helper ext_session_acl to package. (bsc#959290)\n- Update forward_max_tries to permit 25 server paths\n  With cloud sites becoming more popular more CDN servers are producing\n  long lists of IPv6 and IPv4 addresses. If there are not enough paths\n  selected the IPv4 ones may never be reached.\n- squid.init: wait that squid really dies when we kill it on upgrade instead\n  of proclaiming its demise prematurely (bnc#963539)\n","status":"published","published":"2016-08-09T11:32:29Z","modified":"2026-02-04T04:20:47.153034Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"UBUNTU-CVE-2015-3455","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.","status":"published","published":"2015-05-18T15:59:00Z","modified":"2025-09-08T16:43:22Z","updated_at":"2026-11-02T15:54:10.045446Z"}]}}