{"id":"UBUNTU-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":"2026-02-04T02:57:54.664262Z","published":"2016-12-31T00:00:00Z","related":["USN-3171-1","USN-4587-1"],"upstream":["CVE-2016-9942"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9942"},{"type":"REPORT","url":"https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.11"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3171-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-9942"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4587-1"}],"affected":[{"package":{"name":"libvncserver","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.9+dfsg-1ubuntu1.2?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.9+dfsg-1ubuntu1.2"}]}],"versions":["0.9.9+dfsg-1","0.9.9+dfsg-1ubuntu1","0.9.9+dfsg-1ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libvncserver-config","binary_version":"0.9.9+dfsg-1ubuntu1.2"},{"binary_name":"libvncserver-dev","binary_version":"0.9.9+dfsg-1ubuntu1.2"},{"binary_name":"libvncserver0","binary_version":"0.9.9+dfsg-1ubuntu1.2"},{"binary_name":"linuxvnc","binary_version":"0.9.9+dfsg-1ubuntu1.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9942.json"}},{"package":{"name":"italc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/italc@1:2.0.2+dfsg1-4ubuntu0.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.0.2+dfsg1-4ubuntu0.1"}]}],"versions":["1:2.0.2+dfsg1-3","1:2.0.2+dfsg1-4"],"ecosystem_specific":{"binaries":[{"binary_name":"italc-client","binary_version":"1:2.0.2+dfsg1-4ubuntu0.1"},{"binary_name":"italc-management-console","binary_version":"1:2.0.2+dfsg1-4ubuntu0.1"},{"binary_name":"italc-master","binary_version":"1:2.0.2+dfsg1-4ubuntu0.1"},{"binary_name":"libitalccore","binary_version":"1:2.0.2+dfsg1-4ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9942.json"}},{"package":{"name":"libvncserver","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.10+dfsg-3ubuntu0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.10+dfsg-3ubuntu0.16.04.1"}]}],"versions":["0.9.10+dfsg-3","0.9.10+dfsg-3build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libvncclient1","binary_version":"0.9.10+dfsg-3ubuntu0.16.04.1"},{"binary_name":"libvncserver-config","binary_version":"0.9.10+dfsg-3ubuntu0.16.04.1"},{"binary_name":"libvncserver-dev","binary_version":"0.9.10+dfsg-3ubuntu0.16.04.1"},{"binary_name":"libvncserver1","binary_version":"0.9.10+dfsg-3ubuntu0.16.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9942.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}