{"id":"USN-4407-1","summary":"libvncserver vulnerabilities","details":"It was discovered that LibVNCServer incorrectly handled decompressing data. An\nattacker could possibly use this issue to cause LibVNCServer to crash,\nresulting in a denial of service. (CVE-2019-15680)\n\nIt was discovered that an information disclosure vulnerability existed in\nLibVNCServer when sending a ServerCutText message. An attacker could possibly\nuse this issue to expose sensitive information. This issue only affected\nUbuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS. (CVE-2019-15681)\n\nIt was discovered that LibVNCServer incorrectly handled cursor shape updates.\nIf a user were tricked in to connecting to a malicious server, an attacker\ncould possibly use this issue to cause LibVNCServer to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. This issue only\naffected Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS.\n(CVE-2019-15690, CVE-2019-20788)\n\nIt was discovered that LibVNCServer incorrectly handled decoding WebSocket\nframes. An attacker could possibly use this issue to cause LibVNCServer to\ncrash, resulting in a denial of service, or possibly execute arbitrary code.\nThis issue only affected Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS.\n(CVE-2017-18922)\n","modified":"2026-02-10T04:41:51Z","published":"2020-07-01T23:44:41Z","related":["UBUNTU-CVE-2017-18922","UBUNTU-CVE-2019-15680","UBUNTU-CVE-2019-15681","UBUNTU-CVE-2019-15690","UBUNTU-CVE-2019-20788"],"upstream":["CVE-2017-18922","CVE-2019-15680","CVE-2019-15681","CVE-2019-15690","CVE-2019-20788","UBUNTU-CVE-2017-18922","UBUNTU-CVE-2019-15680","UBUNTU-CVE-2019-15681","UBUNTU-CVE-2019-15690","UBUNTU-CVE-2019-20788"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4407-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-18922"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-15680"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-15681"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-15690"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20788"}],"affected":[{"package":{"name":"libvncserver","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.10+dfsg-3ubuntu0.16.04.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.10+dfsg-3ubuntu0.16.04.4"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.4","binary_name":"libvncclient1"},{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.4","binary_name":"libvncserver-config"},{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.4","binary_name":"libvncserver-dev"},{"binary_version":"0.9.10+dfsg-3ubuntu0.16.04.4","binary_name":"libvncserver1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2017-18922"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2019-15680"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2019-15681"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-15690"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-20788"}],"ecosystem":"Ubuntu:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4407-1.json"}},{"package":{"name":"libvncserver","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.11+dfsg-1ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.11+dfsg-1ubuntu1.2"}]}],"versions":["0.9.11+dfsg-1","0.9.11+dfsg-1ubuntu1","0.9.11+dfsg-1ubuntu1.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.9.11+dfsg-1ubuntu1.2","binary_name":"libvncclient1"},{"binary_version":"0.9.11+dfsg-1ubuntu1.2","binary_name":"libvncserver-config"},{"binary_version":"0.9.11+dfsg-1ubuntu1.2","binary_name":"libvncserver-dev"},{"binary_version":"0.9.11+dfsg-1ubuntu1.2","binary_name":"libvncserver1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2017-18922"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2019-15680"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2019-15681"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-15690"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-20788"}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4407-1.json"}},{"package":{"name":"libvncserver","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libvncserver@0.9.12+dfsg-9ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.12+dfsg-9ubuntu0.1"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.9.12+dfsg-9ubuntu0.1","binary_name":"libvncclient1"},{"binary_version":"0.9.12+dfsg-9ubuntu0.1","binary_name":"libvncserver-dev"},{"binary_version":"0.9.12+dfsg-9ubuntu0.1","binary_name":"libvncserver1"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2017-18922"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2019-15680"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-15690"}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4407-1.json"}}],"schema_version":"1.7.3"}