{"id":"USN-4636-1","summary":"libvncserver, vino vulnerability","details":"It was discovered that LibVNCServer incorrectly handled certain internals.\nAn attacker could possibly use this issue to cause a denial of service.\nThis issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.\n\nVino package ships with a LibVNCServer source and all listed releases were\naffected for this package.\n","modified":"2026-02-10T04:41:59Z","published":"2020-11-17T17:31:54Z","related":["UBUNTU-CVE-2020-25708"],"upstream":["CVE-2020-25708","UBUNTU-CVE-2020-25708"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4636-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25708"}],"affected":[{"package":{"name":"libvncserver","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.10+dfsg-3ubuntu0.16.04.6?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.10+dfsg-3ubuntu0.16.04.6"}]}],"versions":["0.9.10+dfsg-3","0.9.10+dfsg-3build1","0.9.10+dfsg-3ubuntu0.16.04.1","0.9.10+dfsg-3ubuntu0.16.04.2","0.9.10+dfsg-3ubuntu0.16.04.3","0.9.10+dfsg-3ubuntu0.16.04.4","0.9.10+dfsg-3ubuntu0.16.04.5"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.6","binary_name":"libvncclient1"},{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.6","binary_name":"libvncserver-config"},{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.6","binary_name":"libvncserver-dev"},{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.6","binary_name":"libvncserver1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4636-1.json","cves_map":{"cves":[{"id":"CVE-2020-25708","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"vino","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/vino@3.8.1-0ubuntu9.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-0ubuntu9.4"}]}],"versions":["3.8.1-0ubuntu6","3.8.1-0ubuntu7","3.8.1-0ubuntu8","3.8.1-0ubuntu9","3.8.1-0ubuntu9.1","3.8.1-0ubuntu9.2","3.8.1-0ubuntu9.3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.8.1-0ubuntu9.4","binary_name":"vino"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4636-1.json","cves_map":{"cves":[{"id":"CVE-2020-25708","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"libvncserver","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.11+dfsg-1ubuntu1.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.11+dfsg-1ubuntu1.4"}]}],"versions":["0.9.11+dfsg-1","0.9.11+dfsg-1ubuntu1","0.9.11+dfsg-1ubuntu1.1","0.9.11+dfsg-1ubuntu1.2","0.9.11+dfsg-1ubuntu1.3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.11+dfsg-1ubuntu1.4","binary_name":"libvncclient1"},{"binary_version":"0.9.11+dfsg-1ubuntu1.4","binary_name":"libvncserver-config"},{"binary_version":"0.9.11+dfsg-1ubuntu1.4","binary_name":"libvncserver-dev"},{"binary_version":"0.9.11+dfsg-1ubuntu1.4","binary_name":"libvncserver1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4636-1.json","cves_map":{"cves":[{"id":"CVE-2020-25708","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"vino","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/vino@3.22.0-3ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.22.0-3ubuntu1.2"}]}],"versions":["3.8.1-0ubuntu12","3.22.0-2ubuntu1","3.22.0-3ubuntu1","3.22.0-3ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.22.0-3ubuntu1.2","binary_name":"vino"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4636-1.json","cves_map":{"cves":[{"id":"CVE-2020-25708","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"libvncserver","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.12+dfsg-9ubuntu0.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.12+dfsg-9ubuntu0.3"}]}],"versions":["0.9.11+dfsg-1.3","0.9.12+dfsg-3ubuntu3","0.9.12+dfsg-6","0.9.12+dfsg-7","0.9.12+dfsg-8","0.9.12+dfsg-9","0.9.12+dfsg-9ubuntu0.1","0.9.12+dfsg-9ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.12+dfsg-9ubuntu0.3","binary_name":"libvncclient1"},{"binary_version":"0.9.12+dfsg-9ubuntu0.3","binary_name":"libvncserver-dev"},{"binary_version":"0.9.12+dfsg-9ubuntu0.3","binary_name":"libvncserver1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4636-1.json","cves_map":{"cves":[{"id":"CVE-2020-25708","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}},{"package":{"name":"vino","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/vino@3.22.0-5ubuntu2.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.22.0-5ubuntu2.2"}]}],"versions":["3.22.0-5ubuntu2","3.22.0-5ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.22.0-5ubuntu2.2","binary_name":"vino"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4636-1.json","cves_map":{"cves":[{"id":"CVE-2020-25708","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.3"}