{"id":"CVE-2018-20721","aliases":["DEBIAN-CVE-2018-20721","DLA-1682-1","DLA-2834-1","EUVD-2018-13266","GHSA-vxxw-p73w-mwf4","SUSE-SU-2019:0228-1","UBUNTU-CVE-2018-20721","USN-5172-1","USN-5172-2","openSUSE-SU-2019:0165-1","openSUSE-SU-2019:0171-1","openSUSE-SU-2024:11488-1"],"status":"published","title":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex*...","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0205,"percentile":0.81396,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2019-01-16T14:00:00Z","modified":"2026-10-23T18:03:05Z","fixes":[{"ecosystem":"Debian:12","package":"uriparser","fixed_in":["0.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"uriparser","fixed_in":["0.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"uriparser","fixed_in":["0.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:8","package":"uriparser","fixed_in":["0.8.0.1-2+deb8u2"],"sources":["osv"]},{"ecosystem":"Debian:9","package":"uriparser","fixed_in":["0.8.4-1+deb9u2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:14.04:LTS","package":"uriparser","fixed_in":["0.7.5-1ubuntu2+esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"uriparser","fixed_in":["0.8.4-1ubuntu0.16.04.1~esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"uriparser","fixed_in":["0.8.4-1+deb9u2build0.18.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:8","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0.1-2+deb8u2"}]}],"versions":["0.8.0.1-2","0.8.0.1-2+deb8u1"]},{"source":"osv","ecosystem":"Debian:9","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4-1+deb9u2"}]}],"versions":["0.8.4-1","0.8.4-1+deb9u1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-1ubuntu2+esm2"}]}],"versions":["0.7.5-1","0.7.5-1ubuntu1","0.7.5-1ubuntu2","0.7.5-1ubuntu2+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4-1ubuntu0.16.04.1~esm2"}]}],"versions":["0.8.2-1","0.8.3-1","0.8.4-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4-1+deb9u2build0.18.04.1"}]}],"versions":["0.8.4-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4-1+deb9u2build0.18.04.1"}]}],"versions":["0.8.4-1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.5-1ubuntu2+esm2"}]}],"versions":["0.7.5-1","0.7.5-1ubuntu1","0.7.5-1ubuntu2","0.7.5-1ubuntu2+esm1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4-1ubuntu0.16.04.1~esm2"}]}],"versions":["0.8.2-1","0.8.3-1","0.8.4-1"],"bundled":4},{"source":"osv","ecosystem":"openSUSE:Leap 15.0","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.5-lp150.2.3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Package Hub 15","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.5-bp150.2.3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"uriparser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.5-1.2"}]}],"bundled":4}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"uriparser_project","product":"uriparser"}],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2019/02/msg00028.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://github.com/uriparser/uriparser/commit/cef25028de5ff872c2e1f0a6c562eb3ea9ecbce4","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://github.com/uriparser/uriparser/blob/master/ChangeLog","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Third Party Advisory","advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00029.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20721"},{"url":"https://github.com/advisories/GHSA-vxxw-p73w-mwf4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-20721","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2019/suse-su-20190228-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1115722","tags":["report"]},{"url":"https://bugzilla.suse.com/1115723","tags":["report"]},{"url":"https://bugzilla.suse.com/1115724","tags":["report"]},{"url":"https://bugzilla.suse.com/1122193","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19198","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19199","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19200","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-20721","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2018-20721","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-5172-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-20721","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-5172-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-19198","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-19199","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-19200","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/DKZ2NZQRNUAKKDGMLSBN4JO4TSGD4AQC/#DKZ2NZQRNUAKKDGMLSBN4JO4TSGD4AQC","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/N2HDQPAE2BYVHUDZFAEARC2MXGC7KBVR/#N2HDQPAE2BYVHUDZFAEARC2MXGC7KBVR","tags":["advisory"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2018-20721","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2019-01-16T14:00:00Z","modified":"2024-08-05T12:12:28.191Z","updated_at":"2026-11-02T14:35:00.237825Z"}],"euvd":[{"id":"EUVD-2018-13266","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2019-01-16T14:00:00Z","modified":"2024-08-05T12:12:28Z","updated_at":"2026-11-03T02:39:29.769885Z"}],"ghsa":[{"id":"GHSA-vxxw-p73w-mwf4","title":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex*...","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2022-05-13T01:04:24Z","modified":"2023-02-01T05:02:51Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:49:58.981291Z"}],"nvd":[{"id":"CVE-2018-20721","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2019-01-16T14:29:00.247Z","modified":"2026-06-17T01:53:21.17Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","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-125"],"updated_at":"2026-11-02T14:04:53.079938Z"}],"osv":[{"id":"CVE-2018-20721","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2019-01-16T14:29:00.247Z","modified":"2026-10-20T13:28:58.307738421Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:09.145458Z"},{"id":"DEBIAN-CVE-2018-20721","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2019-01-16T14:29:00.247Z","modified":"2026-10-23T18:03:05.206801584Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:30.867575Z"},{"id":"UBUNTU-CVE-2018-20721","description":"URI_FUNC() in UriParse.c in uriparser before 0.9.1 has an out-of-bounds read (in uriParse*Ex* functions) for an incomplete URI with an IPv6 address containing an embedded IPv4 address, such as a \"//[::44.1\" address.","status":"published","published":"2019-01-16T14:29:00Z","modified":"2026-04-22T11:52:39.707392Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"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":"2026-11-02T15:54:17.91743Z"},{"id":"DLA-1682-1","title":"uriparser - security update","status":"published","published":"2019-02-18T00:00:00Z","modified":"2026-03-09T01:20:20.847123Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"DLA-2834-1","title":"uriparser - security update","status":"published","published":"2021-11-30T00:00:00Z","modified":"2026-03-09T01:21:22.897159Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"openSUSE-SU-2019:0165-1","title":"Security update for uriparser","description":"This update for uriparser fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2018-20721: Fixed an out-of-bounds read for incomplete URIs with IPv6 addresses with embedded IPv4 address (bsc#1122193).\n- CVE-2018-19198: Fixed an out-of-bounds write that was possible via the uriComposeQuery* or uriComposeQueryEx* function (bsc#1115722).\n- CVE-2018-19199: Fixed an integer overflow caused by an unchecked multiplication via the uriComposeQuery* or uriComposeQueryEx* function (bsc#1115723).\n- CVE-2018-19200: Fixed a operation attempted on NULL input via a uriResetUri* function (bsc#1115724).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2019-03-23T10:56:57Z","modified":"2026-02-04T03:42:01.639161Z","updated_at":"2026-11-02T16:58:30.39372Z"},{"id":"openSUSE-SU-2019:0171-1","title":"Security update for uriparser","description":"This update for uriparser fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2018-20721: Fixed an out-of-bounds read for incomplete URIs with IPv6 addresses with embedded IPv4 address (bsc#1122193).\n- CVE-2018-19198: Fixed an out-of-bounds write that was possible via the uriComposeQuery* or uriComposeQueryEx* function (bsc#1115722).\n- CVE-2018-19199: Fixed an integer overflow caused by an unchecked multiplication via the uriComposeQuery* or uriComposeQueryEx* function (bsc#1115723).\n- CVE-2018-19200: Fixed a operation attempted on NULL input via a uriResetUri* function (bsc#1115724).\n\nThis update was imported from the SUSE:SLE-15:Update update project.\nThis update was imported from the openSUSE:Leap:15.0:Update update project.","status":"published","published":"2019-02-13T17:02:43Z","modified":"2026-02-04T03:29:11.520442Z","updated_at":"2026-11-02T16:58:30.39372Z"},{"id":"openSUSE-SU-2024:11488-1","title":"liburiparser1-0.9.5-1.2 on GA media","description":"These are all security issues fixed in the liburiparser1-0.9.5-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:47:19.650785Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"SUSE-SU-2019:0228-1","title":"Security update for uriparser","description":"This update for uriparser fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2018-20721: Fixed an out-of-bounds read for incomplete URIs with IPv6 addresses with embedded IPv4 address (bsc#1122193).\n- CVE-2018-19198: Fixed an out-of-bounds write that was possible via the uriComposeQuery* or uriComposeQueryEx* function (bsc#1115722).\n- CVE-2018-19199: Fixed an integer overflow caused by an unchecked multiplication via the uriComposeQuery* or uriComposeQueryEx* function (bsc#1115723).\n- CVE-2018-19200: Fixed a operation attempted on NULL input via a uriResetUri* function (bsc#1115724).\n","status":"published","published":"2019-02-05T09:07:24Z","modified":"2025-05-02T04:08:04.473422Z","updated_at":"2026-11-02T15:53:45.926331Z"},{"id":"USN-5172-1","title":"uriparser vulnerabilities","description":"It was discovered that uriparser mishandled certain input. An attacker\ncould use this vulnerability to cause uriparser to crash or possibly\nexecute arbitrary code. (CVE-2018-19198, CVE-2018-19199, CVE-2018-19200)\n\nIt was discovered that uriparser incorrectly handled certain URIs. An\nattacker could use this vulnerability to cause a crash or possibly leak\nsensitive information. (CVE-2018-20721)\n","status":"published","published":"2021-12-06T12:53:01Z","modified":"2026-04-22T10:19:34.693456Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-5172-2","title":"uriparser vulnerability","description":"USN-5172-1 fixed vulnerabilities in uriparser.\nThis update provides the corresponding updates for Ubuntu 14.04 ESM and\nUbuntu 16.04 ESM.\n\nOriginal advisory details:\n\n It was discovered that uriparser mishandled certain input. An attacker\n could use this vulnerability to cause uriparser to crash or possibly\n execute arbitrary code. (CVE-2018-19198, CVE-2018-19199, CVE-2018-19200)\n\n It was discovered that uriparser incorrectly handled certain URIs. An\n attacker could use this vulnerability to cause a crash or possibly leak\n sensitive information. (CVE-2018-20721)\n","status":"published","published":"2021-12-09T11:45:04Z","modified":"2026-06-29T13:48:18.207830536Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}