{"id":"UBUNTU-CVE-2021-27135","details":"xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence.","modified":"2026-02-04T03:01:47.169955Z","published":"2021-02-10T16:15:00Z","related":["USN-4746-1"],"upstream":["CVE-2021-27135"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-27135"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/02/09/7"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/02/09/9"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/02/10/7"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4746-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-27135"}],"affected":[{"package":{"name":"xterm","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xterm@322-1ubuntu1.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"322-1ubuntu1.2"}]}],"versions":["318-2ubuntu1","318-2ubuntu2","322-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"322-1ubuntu1.2","binary_name":"xterm"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27135.json"}},{"package":{"name":"xterm","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/xterm@330-1ubuntu2.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"330-1ubuntu2.2"}]}],"versions":["324-2ubuntu1","330-1ubuntu1","330-1ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"330-1ubuntu2.2","binary_name":"xterm"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27135.json"}},{"package":{"name":"xterm","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/xterm@353-1ubuntu1.20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"353-1ubuntu1.20.04.2"}]}],"versions":["348-2ubuntu1","353-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"353-1ubuntu1.20.04.2","binary_name":"xterm"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-27135.json"}}],"schema_version":"1.7.3","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"}]}