{"id":"UBUNTU-CVE-2020-10593","details":"Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), aka TROVE-2020-004. This occurs in circpad_setup_machine_on_circ because a circuit-padding machine can be negotiated twice on the same circuit.","modified":"2025-07-16T08:24:34.440532Z","published":"2020-03-23T13:15:00Z","withdrawn":"2025-07-18T16:45:46Z","upstream":["CVE-2020-10593"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-10593"},{"type":"REPORT","url":"https://blog.torproject.org/new-releases-03510-0419-0427"},{"type":"REPORT","url":"https://bugs.torproject.org/33619"},{"type":"REPORT","url":"https://trac.torproject.org/projects/tor/ticket/33619"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-10593"}],"affected":[{"package":{"name":"tor","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tor@0.4.2.7-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.2.7-1"}]}],"versions":["0.4.1.5-1","0.4.1.5-1build1","0.4.1.6-1","0.4.2.5-1","0.4.2.6-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.4.2.7-1","binary_name":"tor"},{"binary_version":"0.4.2.7-1","binary_name":"tor-dbgsym"},{"binary_version":"0.4.2.7-1","binary_name":"tor-geoipdb"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-10593.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:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}