{"id":"UBUNTU-CVE-2018-20721","details":"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.","modified":"2026-04-22T11:52:39.707392Z","published":"2019-01-16T14:29:00Z","related":["USN-5172-1","USN-5172-2"],"upstream":["CVE-2018-20721"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20721"},{"type":"REPORT","url":"https://github.com/uriparser/uriparser/commit/cef25028de5ff872c2e1f0a6c562eb3ea9ecbce4"},{"type":"REPORT","url":"https://github.com/uriparser/uriparser/blob/master/ChangeLog"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5172-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-20721"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5172-2"}],"affected":[{"package":{"name":"uriparser","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/uriparser@0.7.5-1ubuntu2+esm2?arch=source&distro=trusty/esm"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"liburiparser1","binary_version":"0.7.5-1ubuntu2+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20721.json"}},{"package":{"name":"uriparser","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/uriparser@0.8.4-1ubuntu0.16.04.1~esm2?arch=source&distro=esm-apps/xenial"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"liburiparser1","binary_version":"0.8.4-1ubuntu0.16.04.1~esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20721.json"}},{"package":{"name":"uriparser","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/uriparser@0.8.4-1+deb9u2build0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.4-1+deb9u2build0.18.04.1"}]}],"versions":["0.8.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"liburiparser1","binary_version":"0.8.4-1+deb9u2build0.18.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20721.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}