{"id":"CVE-2016-3947","aliases":["DEBIAN-CVE-2016-3947","EUVD-2016-4959","GHSA-59fp-mgp3-qph8","MGASA-2016-0133","SUSE-SU-2016:2008-1","SUSE-SU-2016:2089-1","UBUNTU-CVE-2016-3947","USN-2995-1","openSUSE-SU-2024:11403-1"],"status":"published","title":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in...","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","severity":{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.1462,"percentile":0.96675,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119"],"published":"2016-04-06T14:09:53Z","modified":"2026-10-24T10:30:56Z","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":"Ubuntu:14.04:LTS","package":"squid3","fixed_in":["3.3.8-1ubuntu6.8"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"squid3","fixed_in":["3.5.12-1ubuntu7.2"],"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:5","package":"squid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.16-1.mga5"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux 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Advisory","advisory","web","report"]},{"url":"http://www.ubuntu.com/usn/USN-2995-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","advisory"]},{"url":"http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10495.patch","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://www.securitytracker.com/id/1035457","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.squid-cache.org/Versions/v3/3.4/changesets/squid-3.4-13232.patch","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12694.patch","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-3947"},{"url":"https://github.com/advisories/GHSA-59fp-mgp3-qph8"},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-3947","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2016-0133.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=18122","tags":["report"]},{"url":"http://www.squid-cache.org/Advisories/SQUID-2016_4.txt","tags":["web"]},{"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://www.suse.com/support/update/announcement/2016/suse-su-20162089-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/895773","tags":["report"]},{"url":"https://bugzilla.suse.com/967011","tags":["report"]},{"url":"https://bugzilla.suse.com/976708","tags":["report"]},{"url":"https://bugzilla.suse.com/993299","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2011-3205","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4096","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-5643","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-0188","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4115","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0128","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-6270","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-7141","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-7142","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2390","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2016-3947","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2995-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-3947","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4051","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4052","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4053","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4054","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4553","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4554","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4555","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-4556","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2016-10002","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-10003","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000024","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000027","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1172","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19131","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19132","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12519","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12523","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12525","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12526","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12527","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12528","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12529","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12854","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-13345","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-18677","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-18678","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-18679","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-18860","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-11945","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-14059","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15049","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15810","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15811","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-24606","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-25097","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8449","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8517","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28651","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28652","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28662","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-31806","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2016-3947","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2016-04-07T18:00:00Z","modified":"2024-08-06T00:10:31.953Z","updated_at":"2026-11-02T14:33:34.094161Z"}],"euvd":[{"id":"EUVD-2016-4959","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2016-04-07T18:00:00Z","modified":"2024-08-06T00:10:31Z","updated_at":"2026-11-03T02:22:48.690835Z"}],"ghsa":[{"id":"GHSA-59fp-mgp3-qph8","title":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in...","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2022-05-17T03:41:30Z","modified":"2023-01-27T05:08:57Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:43:21.16147Z"}],"nvd":[{"id":"CVE-2016-3947","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2016-04-07T18:59:00.137Z","modified":"2026-06-17T00:46:36.943Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:03:22.479119Z"}],"osv":[{"id":"CVE-2016-3947","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2016-04-07T18:59:00.137Z","modified":"2026-10-24T10:30:56.253034528Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:02.454775Z"},{"id":"DEBIAN-CVE-2016-3947","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2016-04-07T18:59:00.137Z","modified":"2026-09-22T07:00:46.467212892Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:27.627285Z"},{"id":"UBUNTU-CVE-2016-3947","description":"Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.","status":"published","published":"2016-04-07T00:00:00Z","modified":"2026-02-04T02:51:45.983841Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:12.261906Z"},{"id":"MGASA-2016-0133","title":"Updated squid packages fix security vulnerabilities","description":"Updated squid packages fix security vulnerabilities:\n\nDue to a buffer overrun, the Squid pinger binary in Squid before 3.5.16 is\nvulnerable to a denial of service or information leak attack when processing\nICMPv6 packets. This bug also permits the server response to manipulate other\nICMP and ICMPv6 queries processing to cause information leaks (CVE-2016-3947).\n\nDue to incorrect bounds checking, Squid before 3.5.16 is vulnerable to a\ndenial of service attack when processing HTTP responses (CVE-2016-3948).\n","status":"published","published":"2016-04-06T14:09:53Z","modified":"2026-04-16T06:24:29.46316447Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"openSUSE-SU-2024:11403-1","title":"squid-4.16-1.5 on GA media","description":"These are all security issues fixed in the squid-4.16-1.5 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:28:26.444707Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"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":"SUSE-SU-2016:2089-1","title":"Security update for squid3","description":"\n\nThis update for squid3 fixes the following issues:\n\n- Multiple issues in pinger ICMP processing.  (CVE-2014-7141, CVE-2014-7142) \n\n- CVE-2016-3947: Buffer overrun issue in pinger\n    ICMPv6 processing. (bsc#973782)\n\n-  CVE-2016-4554: fix header smuggling issue in HTTP Request processing (bsc#979010)\n\n- Fix 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- Regression caused by the DoS fixes above (bsc#993299)\n\n- CVE-2016-3948: Fix denial of service in HTTP Response processing (bsc#973783)\n\n- CVE-2016-4051: fixes buffer overflow in cachemgr.cgi (bsc#976553)\n\n- CVE-2016-4052, CVE-2016-4053, CVE-2016-4054:\n  * fixes multiple issues in ESI processing (bsc#976556)\n\n- CVE-2016-4556: fixes double free vulnerability in Esi.cc (bsc#979008)\n\n- CVE-2015-5400: Improper Protection of Alternate Path (bsc#938715)\n\n- CVE-2014-6270: fix off-by-one in snmp subsystem (bsc#895773)\n\n- Memory leak in squid3 when using external_acl (bsc#976708)\n","status":"published","published":"2016-08-16T12:56:03Z","modified":"2026-02-04T03:13:42.545823Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"USN-2995-1","title":"squid3 vulnerabilities","description":"Yuriy M. Kaminskiy discovered that the Squid pinger utility incorrectly\nhandled certain ICMPv6 packets. A remote attacker could use this issue to\ncause Squid to crash, resulting in a denial of service, or possibly cause\nSquid to leak information into log files. (CVE-2016-3947)\n\nYuriy M. Kaminskiy discovered that the Squid cachemgr.cgi tool incorrectly\nhandled certain crafted data. A remote attacker could use this issue to\ncause Squid to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2016-4051)\n\nIt was discovered that Squid incorrectly handled certain Edge Side Includes\n(ESI) responses. A remote attacker could possibly use this issue to cause\nSquid to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2016-4052, CVE-2016-4053, CVE-2016-4054)\n\nJianjun Chen discovered that Squid did not correctly ignore the Host header\nwhen absolute-URI is provided. A remote attacker could possibly use this\nissue to conduct cache-poisoning attacks. This issue only affected Ubuntu\n14.04 LTS, Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2016-4553)\n\nJianjun Chen discovered that Squid incorrectly handled certain HTTP Host\nheaders. A remote attacker could possibly use this issue to conduct\ncache-poisoning attacks. (CVE-2016-4554)\n\nIt was discovered that Squid incorrectly handled certain Edge Side Includes\n(ESI) responses. A remote attacker could possibly use this issue to cause\nSquid to crash, resulting in a denial of service. (CVE-2016-4555,\nCVE-2016-4556)\n","status":"published","published":"2016-06-09T17:10:37Z","modified":"2026-02-10T04:41:00Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}