{"id":"UBUNTU-CVE-2021-34550","details":"An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor","modified":"2026-02-04T02:40:16.268339Z","published":"2021-06-29T12:15:00Z","related":["USN-5036-1"],"upstream":["CVE-2021-34550"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-34550"},{"type":"REPORT","url":"https://blog.torproject.org/node/2041"},{"type":"REPORT","url":"https://gitlab.torproject.org/tpo/core/tor/-/commit/f57b5c48e0aa01acd84a194fe4657a0d1cee04cf"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5036-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-34550"}],"affected":[{"package":{"name":"tor","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tor@0.3.2.10-1ubuntu0.2~esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-1ubuntu0.2~esm2"}]}],"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","0.3.2.10-1","0.3.2.10-1ubuntu0.1","0.3.2.10-1ubuntu0.2~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"tor","binary_version":"0.3.2.10-1ubuntu0.2~esm2"},{"binary_version":"0.3.2.10-1ubuntu0.2~esm2","binary_name":"tor-geoipdb"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34550.json"}},{"package":{"name":"tor","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/tor@0.4.2.7-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.2.7-1ubuntu0.1~esm1"}]}],"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","0.4.2.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"tor","binary_version":"0.4.2.7-1ubuntu0.1~esm1"},{"binary_name":"tor-geoipdb","binary_version":"0.4.2.7-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34550.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":"medium"}]}