{"id":"CVE-2017-7376","aliases":["CLSA-2024-1708417192","DEBIAN-CVE-2017-7376","DLA-1060-1","DSA-3952-1","EUVD-2017-16403","GHSA-j45j-3c7p-vf8f","MGASA-2018-0048","SUSE-SU-2017:1813-1","UBUNTU-CVE-2017-7376","USN-3424-1"],"status":"published","title":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an...","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.23156,"percentile":0.97776,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-119"],"published":"2017-06-21T00:00:00Z","modified":"2026-10-24T14:05:36Z","exploits":[{"source":"pocgithub","id":"brahmstaedt/libxml2-exploit","title":"brahmstaedt/libxml2-exploit","date":"2020-06-11","url":"https://github.com/brahmstaedt/libxml2-exploit"}],"fixes":[{"ecosystem":"Debian:12","package":"libxml2","fixed_in":["2.9.4+dfsg1-3.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libxml2","fixed_in":["2.9.4+dfsg1-3.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libxml2","fixed_in":["2.9.4+dfsg1-3.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"libxml2","fixed_in":["2.9.1+dfsg1-3ubuntu4.10"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"libxml2","fixed_in":["2.9.3+dfsg1-1ubuntu0.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"TuxCare:CentOS:7","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1-6.el7_9.6.tuxcare.els3"}]}],"bundled":3},{"source":"osv","ecosystem":"TuxCare:CentOS:7","package":"libxml2-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1-6.el7_9.6.tuxcare.els3"}]}],"bundled":3},{"source":"osv","ecosystem":"TuxCare:CentOS:7","package":"libxml2-python","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1-6.el7_9.6.tuxcare.els3"}]}],"bundled":3},{"source":"osv","ecosystem":"TuxCare:CentOS:7","package":"libxml2-static","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1-6.el7_9.6.tuxcare.els3"}]}],"bundled":3},{"source":"osv","ecosystem":"Debian:12","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.4+dfsg1-3.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.4+dfsg1-3.1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.4+dfsg1-3.1"}]}]},{"source":"osv","ecosystem":"Debian:7","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.0+dfsg1-7+wheezy9"}]}],"versions":["2.8.0+dfsg1-7+nmu1","2.8.0+dfsg1-7+nmu2","2.8.0+dfsg1-7+nmu3","2.8.0+dfsg1-7+wheezy1","2.8.0+dfsg1-7+wheezy2","2.8.0+dfsg1-7+wheezy3","2.8.0+dfsg1-7+wheezy4","2.8.0+dfsg1-7+wheezy5","2.8.0+dfsg1-7+wheezy6","2.8.0+dfsg1-7+wheezy7","2.8.0+dfsg1-7+wheezy8"],"bundled":2},{"source":"osv","ecosystem":"Debian:8","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1+dfsg1-5+deb8u5"}]}],"versions":["2.9.1+dfsg1-5","2.9.1+dfsg1-5+deb8u1","2.9.1+dfsg1-5+deb8u2","2.9.1+dfsg1-5+deb8u3","2.9.1+dfsg1-5+deb8u4"],"bundled":7},{"source":"osv","ecosystem":"Debian:9","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.4+dfsg1-2.2+deb9u1"}]}],"versions":["2.9.4+dfsg1-2.2"],"bundled":7},{"source":"osv","ecosystem":"Mageia:5","package":"libxml2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.7-1.mga5"}]}],"bundled":14},{"source":"osv","ecosystem":"Mageia:5","package":"perl-XML-LibXML","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.100-1.2.mga5"}]}],"bundled":14},{"source":"osv","ecosystem":"SUSE:Linux 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s7-1500 cpu 1518-4 pn/dp mfp"},{"vendor":"siemens","product":"simatic s7-1500 cpu 1518f-4 pn/dp mfp"},{"vendor":"siemens","product":"siplus s7-1500 cpu 1518-4 pn/dp mfp"},{"vendor":"xmlsoft","product":"libxml2"}],"references":[{"url":"https://source.android.com/security/bulletin/2017-06-01","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://www.debian.org/security/2017/dsa-3952","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"https://git.gnome.org/browse/libxml2/commit/?id=5dca9eea1bd4263bfa4d037ab2443de1cd730f7e","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://android.googlesource.com/platform/external/libxml2/+/51e0cb2e5ec18eaf6fb331bc573ff27b743898f4","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"http://www.securityfocus.com/bid/98877","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1462216","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"http://www.securitytracker.com/id/1038623","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-7376"},{"url":"https://github.com/advisories/GHSA-j45j-3c7p-vf8f"},{"url":"https://errata.tuxcare.com/centos7-els/CLSA-2024-1708417192.html","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-7376","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2018-0048.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=19695","tags":["report"]},{"url":"https://chromereleases.googleblog.com/2017/10/stable-channel-update-for-desktop.html","tags":["web"]},{"url":"https://chromereleases.googleblog.com/2017/12/stable-channel-update-for-desktop.html","tags":["web"]},{"url":"https://lists.opensuse.org/opensuse-updates/2017-02/msg00055.html","tags":["web"]},{"url":"https://lists.opensuse.org/opensuse-updates/2017-06/msg00022.html","tags":["web"]},{"url":"https://lists.opensuse.org/opensuse-updates/2017-07/msg00000.html","tags":["web"]},{"url":"https://lists.opensuse.org/opensuse-updates/2017-07/msg00040.html","tags":["web"]},{"url":"https://usn.ubuntu.com/usn/usn-3513-1/","tags":["web"]},{"url":"https://usn.ubuntu.com/usn/usn-3504-1/","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2017/suse-su-20171813-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1024989","tags":["report"]},{"url":"https://bugzilla.suse.com/1044337","tags":["report"]},{"url":"https://bugzilla.suse.com/1044887","tags":["report"]},{"url":"https://bugzilla.suse.com/1044894","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0663","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-5969","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-7375","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-7376","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2017-7376","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-3424-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3424-2","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-7376","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-0663","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-7375","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-9047","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-9048","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-9049","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-9050","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2017-7376","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2018-02-19T19:00:00Z","modified":"2026-10-14T06:30:16.387Z","updated_at":"2026-11-02T14:33:20.488433Z"}],"euvd":[{"id":"EUVD-2017-16403","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2018-02-19T19:00:00Z","modified":"2026-10-14T06:30:16Z","updated_at":"2026-11-02T17:27:17.902641Z"}],"ghsa":[{"id":"GHSA-j45j-3c7p-vf8f","title":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an...","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2022-05-14T01:01:19Z","modified":"2026-10-14T09:32:19Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:13:23.530725Z"}],"nvd":[{"id":"CVE-2017-7376","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2018-02-19T19:29:00.767Z","modified":"2026-10-14T07:16:40.573Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:04:15.877386Z"}],"osv":[{"id":"CVE-2017-7376","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2018-02-19T19:29:00.767Z","modified":"2026-10-24T14:05:36.424970641Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:06.412595Z"},{"id":"DEBIAN-CVE-2017-7376","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2018-02-19T19:29:00.767Z","modified":"2026-10-15T07:47:22.111873469Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:29.412243Z"},{"id":"UBUNTU-CVE-2017-7376","description":"Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects.","status":"published","published":"2017-06-21T00:00:00Z","modified":"2026-04-22T11:31:30.469471Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:15.773974Z"},{"id":"CLSA-2024-1708417192","title":"libxml2: Fix of 3 CVEs","description":"- CVE-2017-7375: add validation for parsed entity references\n- CVE-2017-7376: fix buffer overflow in URL handling\n- CVE-2017-8872: free input buffer in xmlHaltParser","status":"published","published":"2024-02-20T08:19:55Z","modified":"2026-06-01T00:33:04.058403779Z","updated_at":"2026-11-02T15:43:40.88185Z"},{"id":"DLA-1060-1","title":"libxml2 - security update","status":"published","published":"2017-08-19T00:00:00Z","modified":"2026-03-09T01:00:48.852554Z","updated_at":"2026-11-02T15:46:09.336894Z"},{"id":"DSA-3952-1","title":"libxml2 - security update","status":"published","published":"2017-08-23T00:00:00Z","modified":"2026-03-09T01:20:07.732982Z","updated_at":"2026-11-02T15:46:16.523846Z"},{"id":"MGASA-2018-0048","title":"Updated libxml2 \u0026 perl-XML-LibXML packages fix security vulnerabilities","description":"Use-after-free error could lead to crash (CVE-2016-4658).\n\nUse-after-free vulnerability in libxml2 through 2.9.4 allows remote\nattackers to cause a denial of service or possibly have unspecified\nother impact via vectors related to the XPointer range-to function\n(CVE-2016-5131).\n\nlibxml2 2.9.4 and earlier does not offer a flag directly indicating that\nthe current document may be read but other files may not be opened,\nwhich makes it easier for remote attackers to conduct XML External\nEntity (XXE) attacks via a crafted document (CVE-2016-9318).\n\nHeap buffer overflow in xmlAddID (CVE-2017-0663).\n\nInteger overflow in memory debug code in libxml2 before 2.9.5\n(CVE-2017-5130).\n\nNULL pointer deref in xmlDumpElementContent (CVE-2017-5969).\n\nPrevent unwanted external entity reference (CVE-2017-7375).\n\nIncrease buffer space for port in HTTP redirect support (CVE-2017-7376).\n\nThe function xmlSnprintfElementContent in valid.c was vulnerable to a\nstack buffer overflow (CVE-2017-9047, CVE-2017-9048).\n\nThe function xmlDictComputeFastKey in dict.c was vulnerable to a\nheap-based buffer over-read (CVE-2017-9049).\n\nThe function xmlDictAddString was vulnerable to a heap-based buffer\nover-read (CVE-2017-9050).\n\nIt was discovered that libxml2 incorrecty handled certain files. An\nattacker could use this issue with specially constructed XML data to\ncause libxml2 to consume resources, leading to a denial of service\n(CVE-2017-15412).\n\nWei Lei discovered that libxml2 incorrecty handled certain parameter\nentities. An attacker could use this issue with specially constructed\nXML data to cause libxml2 to consume resources, leading to a denial of\nservice (CVE-2017-16932).\n\nThe libxml2 package has been updated to version 2.9.7 to fix these\nissues and several other bugs.\n","status":"published","published":"2018-01-03T15:50:51Z","modified":"2026-04-16T06:24:17.80338112Z","updated_at":"2026-11-02T15:49:40.442238Z"},{"id":"SUSE-SU-2017:1813-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issues:\n\nSecurity issues fixed:\n\n* CVE-2017-0663: Fixed a heap buffer overflow in xmlAddID (bsc#1044337)\n* CVE-2017-5969: Fixed a NULL pointer deref in xmlDumpElementContent (bsc#1024989)\n* CVE-2017-7375: Prevented an unwanted external entity reference (bsc#1044894)\n* CVE-2017-7376: Increase buffer space for port in HTTP redirect support (bsc#1044887)\n\n","status":"published","published":"2017-07-07T09:25:11Z","modified":"2026-02-04T04:02:00.570308Z","updated_at":"2026-11-02T15:53:44.209561Z"},{"id":"USN-3424-1","title":"libxml2 vulnerabilities","description":"It was discovered that a type confusion error existed in libxml2. An\nattacker could use this to specially construct XML data that\ncould cause a denial of service or possibly execute arbitrary\ncode. (CVE-2017-0663)\n\nIt was discovered that libxml2 did not properly validate parsed entity\nreferences. An attacker could use this to specially construct XML\ndata that could expose sensitive information. (CVE-2017-7375)\n\nIt was discovered that a buffer overflow existed in libxml2 when\nhandling HTTP redirects. An attacker could use this to specially\nconstruct XML data that could cause a denial of service or possibly\nexecute arbitrary code. (CVE-2017-7376)\n\nMarcel Böhme and Van-Thuan Pham discovered a buffer overflow in\nlibxml2 when handling elements. An attacker could use this to specially\nconstruct XML data that could cause a denial of service or possibly\nexecute arbitrary code. (CVE-2017-9047)\n\nMarcel Böhme and Van-Thuan Pham discovered a buffer overread\nin libxml2 when handling elements. An attacker could use this\nto specially construct XML data that could cause a denial of\nservice. (CVE-2017-9048)\n\nMarcel Böhme and Van-Thuan Pham discovered multiple buffer overreads\nin libxml2 when handling parameter-entity references. An attacker\ncould use these to specially construct XML data that could cause a\ndenial of service. (CVE-2017-9049, CVE-2017-9050)\n","status":"published","published":"2017-09-19T00:47:53Z","modified":"2026-04-22T09:39:05.633631Z","updated_at":"2026-11-02T16:58:13.496563Z"}]}}