{"id":"USN-3171-1","summary":"libvncserver vulnerabilities","details":"Josef Gajdusek discovered that the LibVNCServer client library incorrectly\nhandled certain FrameBufferUpdate messages.  If a user were tricked into\nconnecting to a malicious server, an attacker could use this issue to cause\na denial of service, or possibly execute arbitrary code. (CVE-2016-9941,\nCVE-2016-9942)\n","modified":"2026-04-22T09:31:20.527925Z","published":"2017-01-11T18:09:31Z","related":["UBUNTU-CVE-2016-9941","UBUNTU-CVE-2016-9942"],"upstream":["CVE-2016-9941","CVE-2016-9942","UBUNTU-CVE-2016-9941","UBUNTU-CVE-2016-9942"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3171-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9941"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9942"}],"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":{"availability":"No subscription required","binaries":[{"binary_name":"libvncserver-config","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"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:14.04:LTS","cves":[{"id":"CVE-2016-9941","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2016-9942","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3171-1.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":{"availability":"No subscription required","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":"libvncserver1","binary_version":"0.9.10+dfsg-3ubuntu0.16.04.1"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2016-9941","severity":[{"score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2016-9942","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3171-1.json"}}],"schema_version":"1.7.5"}