{"id":"CVE-2018-21247","details":"An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.","modified":"2026-05-18T05:50:29.706895281Z","published":"2020-06-17T16:15:11.367Z","related":["ALSA-2021:1811","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","source":"CPE_FIELD","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:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"14.04"},{"last_affected":"16.04"},{"last_affected":"16.04"},{"last_affected":"18.04"},{"last_affected":"18.10"}]},{"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"}]},{"vendor_product":"opensuse:leap","source":"CPE_FIELD","cpes":["cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"15.2"}]},{"vendor_product":"siemens:simatic_itc1500_firmware","source":"CPE_FIELD","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:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}]},{"source":"CPE_FIELD","vendor_product":"siemens:simatic_itc1900_firmware","cpes":["cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}]},{"vendor_product":"siemens:simatic_itc1900_pro_firmware","source":"CPE_FIELD","cpes":["cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}]},{"vendor_product":"siemens:simatic_itc2200_firmware","source":"CPE_FIELD","cpes":["cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.0.0.0"},{"fixed":"3.2.1.0"}]},{"vendor_product":"siemens:simatic_itc2200_pro_firmware","source":"CPE_FIELD","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":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVP7TJVYJDXDFRHVQ3ENEN3H354QPXEZ/"},{"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":"REPORT","url":"https://github.com/LibVNC/libvncserver/issues/253"},{"type":"FIX","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf"},{"type":"FIX","url":"https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libvnc/libvncserver","events":[{"introduced":"0"},{"last_affected":"0a70095271d845d16a3ed17354841b01f33963ad"}],"database_specific":{"source":"CPE_FIELD","cpe":"cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"0.9.12"}]}}],"versions":["LibVNCServer-0.9.12","LibVNCServer-0.9.11","LibVNCServer-0.9.10","LibVNCServer-0.9.9","LibVNCServer-0.9.8","X11VNC_0_9_12","X11VNC_0_9_11","X11VNC_0_9_10","X11VNC_0_9_9","X11VNC_0_9_8","X11VNC_0_9_7","X11VNC_REL_0_9_6","X11VNC_REL_0_9_5","X11VNC_REL_0_9_4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-21247.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:N/A:N"}]}