{"id":"CVE-2019-0820","details":"A denial of service vulnerability exists when .NET Framework and .NET Core improperly process RegEx strings, aka '.NET Framework and .NET Core Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0980, CVE-2019-0981.","aliases":["GHSA-cmhx-cq75-c4mj"],"modified":"2026-07-08T05:54:41.834310391Z","published":"2019-05-16T19:29:00.880Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"2.0-sp2"},{"last_affected":"2.0-sp2"},{"introduced":"3.0-sp2"},{"last_affected":"3.0-sp2"},{"introduced":"3.5"},{"last_affected":"3.5"},{"introduced":"3.5.1"},{"last_affected":"3.5.1"},{"introduced":"4.5.2"},{"last_affected":"4.5.2"},{"introduced":"4.6"},{"last_affected":"4.6"},{"introduced":"4.6.2"},{"last_affected":"4.6.2"},{"introduced":"4.6.2"},{"last_affected":"4.6.2"},{"introduced":"4.7"},{"last_affected":"4.7"},{"introduced":"4.7.1"},{"last_affected":"4.7.1"},{"introduced":"4.7.2"},{"last_affected":"4.7.2"},{"introduced":"4.6"},{"last_affected":"4.6"},{"introduced":"4.6.1"},{"last_affected":"4.6.1"},{"introduced":"4.6.2"},{"last_affected":"4.6.2"},{"introduced":"4.7"},{"last_affected":"4.7"},{"introduced":"4.7.1"},{"last_affected":"4.7.1"},{"introduced":"4.7.2"},{"last_affected":"4.7.2"},{"introduced":"4.7.1"},{"last_affected":"4.7.1"},{"introduced":"4.7.2"},{"last_affected":"4.7.2"},{"introduced":"4.7.2"},{"last_affected":"4.7.2"},{"introduced":"4.7"},{"last_affected":"4.7"},{"introduced":"4.7.1"},{"last_affected":"4.7.1"},{"introduced":"4.7.2"},{"last_affected":"4.7.2"},{"introduced":"4.8"},{"last_affected":"4.8"}],"source":"CPE_STRING","vendor_product":"microsoft:.net_framework","cpes":["cpe:2.3:a:microsoft:.net_framework:2.0:sp2:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:3.0:sp2:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:3.5.1:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.5.2:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.6.1:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.6:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*"]},{"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux","cpes":["cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.0"},{"last_affected":"8.0"}]},{"vendor_product":"redhat:enterprise_linux_eus","cpes":["cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.1"},{"last_affected":"8.1"},{"introduced":"8.2"},{"last_affected":"8.2"},{"introduced":"8.4"},{"last_affected":"8.4"},{"introduced":"8.6"},{"last_affected":"8.6"}],"source":"CPE_STRING"},{"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux_server_aus","cpes":["cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.2"},{"last_affected":"8.2"},{"introduced":"8.4"},{"last_affected":"8.4"},{"introduced":"8.6"},{"last_affected":"8.6"}]},{"cpes":["cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.2"},{"last_affected":"8.2"},{"introduced":"8.4"},{"last_affected":"8.4"},{"introduced":"8.6"},{"last_affected":"8.6"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux_server_tus"}]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1259"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0820"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dotnet/core","events":[{"introduced":"6251598c0087239b392cccda68515cd8c71d7f3d"},{"last_affected":"babd93cbba8eef59a323d66d2f9b63131b81408b"}],"database_specific":{"cpe":["cpe:2.3:a:microsoft:.net_core:1.0:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_core:1.1:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_core:2.1:*:*:*:*:*:*:*","cpe:2.3:a:microsoft:.net_core:2.2:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"1.0"},{"last_affected":"1.0"},{"introduced":"1.1"},{"last_affected":"1.1"},{"introduced":"2.1"},{"last_affected":"2.1"},{"introduced":"2.2"},{"last_affected":"2.2"}],"source":"CPE_STRING"}}],"versions":["1.0","1.1","2.1","2.2","v2.2.0","v2.1.6","v2.2.0-preview3","v1.1.10","v1.0.13","v2.1.5","v2.1.4","v2.2.0-preview1","v2.1.3","v2.1.2","v2.0.9","v1.1.9","v1.0.12","v2.1.1","v2.1.0","v2.0.7-2","v2.1-rc1","v2.0.7","v1.1.8","v1.1.7","v1.0.11","v2.1-preview2","v2.0.6","v1.0.10","v2.1-preview1","v1.1.6","v1.0.9","v2.0.5","v2.0.4","v2.0.3","v1.1.5","v1.0.8","v1.1.4","v1.0.7","v2.0.0","v2.0.0-preview2","v2.0.0-preview1","v1.1.2","v1.0.5","v1.1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