{"id":"CVE-2018-20843","details":"In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).","modified":"2026-04-11T12:08:43.474476Z","published":"2019-06-24T17:15:09.980Z","related":["ALSA-2020:4846","MGASA-2019-0274","SUSE-SU-2019:1834-1","SUSE-SU-2019:1835-1","openSUSE-SU-2019:1777-1","openSUSE-SU-2024:10748-1"],"database_specific":{"unresolved_ranges":[{"cpe":"cpe:2.3:a:oracle:hospitality_res_3700:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"5.7"},{"last_affected":"5.7.6"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:a:oracle:http_server:12.1.3.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"12.1.3.0"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"12.2.1.4.0"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:a:oracle:outside_in_technology:8.5.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.5.4"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:a:oracle:outside_in_technology:8.5.5:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.5.5"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*","extracted_events":[{"fixed":"8.15.0"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*","extracted_events":[{"last_affected":"12.04"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*","extracted_events":[{"last_affected":"14.04"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","extracted_events":[{"last_affected":"16.04"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","extracted_events":[{"last_affected":"18.04"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"18.10"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"19.04"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.0"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"29"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"30"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"15.0"}],"source":"CPE_FIELD"},{"cpe":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"15.1"}],"source":"CPE_FIELD"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CEJJSQSG3KSUQY4FPVHZ7ZTT7FORMFVD/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IDAUGEB3TUP6NEKJDBUBZX7N5OAUOOOK/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00039.html"},{"type":"ADVISORY","url":"https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00028.html"},{"type":"ADVISORY","url":"https://seclists.org/bugtraq/2019/Jun/39"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201911-08"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20190703-0001/"},{"type":"ADVISORY","url":"https://support.f5.com/csp/article/K51011533"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4040-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4040-2/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4472"},{"type":"ADVISORY","url":"https://www.tenable.com/security/tns-2021-11"},{"type":"REPORT","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5226"},{"type":"FIX","url":"https://github.com/libexpat/libexpat/issues/186"},{"type":"FIX","url":"https://github.com/libexpat/libexpat/pull/262"},{"type":"FIX","url":"https://github.com/libexpat/libexpat/pull/262/commits/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuApr2021.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2020.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2020.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libexpat/libexpat","events":[{"introduced":"0"},{"fixed":"d3b78b42a2dcdea98e22625cfff67a49d47e6025"}],"database_specific":{"cpe":"cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.2.7"}],"source":"CPE_FIELD"}}],"versions":["REC1_0","R_1_95_0","R_1_95_2","R_1_95_3","R_1_95_4","R_1_95_5","R_1_95_6","R_1_95_7","R_1_95_8","R_2_0_0","R_2_0_1","R_2_1_0","R_2_1_1","R_2_2_0","R_2_2_1","R_2_2_2","R_2_2_3","R_2_2_4","R_2_2_5","R_2_2_6","V19903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