{"id":"CVE-2019-20840","details":"An issue was discovered in LibVNCServer before 0.9.13. libvncserver/ws_decode.c can lead to a crash because of unaligned accesses in hybiReadAndDecode.","modified":"2026-05-17T11:54:03.418554532Z","published":"2020-06-17T16:15:11.523Z","related":["SUSE-SU-2020:1922-1","SUSE-SU-2020:2167-1","openSUSE-SU-2020:0988-1","openSUSE-SU-2020:1025-1","openSUSE-SU-2020:1056-1","openSUSE-SU-2024:10598-1"],"database_specific":{"unresolved_ranges":[{"vendor_product":"canonical:ubuntu_linux","cpes":["cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"],"extracted_events":[{"last_affected":"14.04"},{"last_affected":"16.04"},{"last_affected":"16.04"},{"last_affected":"18.04"},{"last_affected":"18.10"},{"last_affected":"20.04"}],"source":"CPE_FIELD"},{"vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.0"},{"last_affected":"9.0"}],"source":"CPE_FIELD"},{"cpes":["cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"15.2"}],"source":"CPE_FIELD","vendor_product":"opensuse:leap"},{"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}],"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc1500_firmware","cpes":["cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:*"]},{"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}],"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc1500_pro_firmware","cpes":["cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:*"]},{"cpes":["cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}],"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc1900_firmware"},{"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}],"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc1900_pro_firmware","cpes":["cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:*"]},{"cpes":["cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}],"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc2200_firmware"},{"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc2200_pro_firmware","cpes":["cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}]}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html"},{"type":"ADVISORY","url":"https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4434-1/"},{"type":"FIX","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf"},{"type":"FIX","url":"https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e32882fd76"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}