{"id":"UBUNTU-CVE-2018-0491","details":"A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list.","modified":"2025-09-08T16:44:37Z","published":"2018-03-05T15:29:00Z","upstream":["CVE-2018-0491"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-0491"},{"type":"REPORT","url":"https://trac.torproject.org/projects/tor/ticket/25117"},{"type":"REPORT","url":"https://trac.torproject.org/projects/tor/ticket/24700"},{"type":"REPORT","url":"https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-0491"}],"affected":[{"package":{"name":"tor","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tor@0.3.2.10-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-1"}]}],"versions":["0.3.0.10-1","0.3.1.8-2","0.3.1.9-1","0.3.2.9-1","0.3.2.9-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.3.2.10-1","binary_name":"tor"},{"binary_version":"0.3.2.10-1","binary_name":"tor-geoipdb"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-0491.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:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}