{"id":"CVE-2016-9942","details":"Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.","modified":"2026-04-01T23:57:16.888290Z","published":"2016-12-31T18:59:00.180Z","related":["MGASA-2017-0027","SUSE-SU-2017:0104-1","SUSE-SU-2017:0519-1","SUSE-SU-2017:0622-1","SUSE-SU-2018:0830-1"],"references":[{"type":"WEB","url":"https://usn.ubuntu.com/4587-1/"},{"type":"WEB","url":"http://www.securityfocus.com/bid/95170"},{"type":"WEB","url":"https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.11"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html"},{"type":"ADVISORY","url":"http://www.debian.org/security/2017/dsa-3753"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201702-24"},{"type":"FIX","url":"https://github.com/LibVNC/libvncserver/pull/137"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libvnc/libvncserver","events":[{"introduced":"0"},{"last_affected":"d8bc98386a820e608c88501c1d4e80e047a5bd32"},{"fixed":"8415ff4c3517c6697d53e1a17bba35284f480891"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"0.9.10"}]}}],"versions":["LibVNCServer-0.9.10","LibVNCServer-0.9.8","LibVNCServer-0.9.8.1","LibVNCServer-0.9.8.2","LibVNCServer-0.9.9","X11VNC_0_9_10","X11VNC_0_9_11","X11VNC_0_9_12","X11VNC_0_9_7","X11VNC_0_9_8","X11VNC_0_9_9","X11VNC_REL_0_9_4","X11VNC_REL_0_9_5","X11VNC_REL_0_9_6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-9942.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}