{"id":"CVE-2018-0491","aliases":["DEBIAN-CVE-2018-0491","EUVD-2018-1314","GHSA-8wr4-7fjq-4qxw","MGASA-2018-0161","UBUNTU-CVE-2018-0491","openSUSE-SU-2018:0614-1","openSUSE-SU-2018:0620-1","openSUSE-SU-2024:11469-1"],"status":"published","title":"A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers...","description":"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.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.1479,"percentile":0.96703,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-416"],"published":"2018-03-05T15:00:00Z","modified":"2026-10-24T10:30:22Z","exploits":[{"source":"exploitdb","id":"EDB-44994","title":"Tor Browser \u003c 0.3.2.10 - Use After Free (PoC)","type":"dos","platform":"linux","date":"2018-07-09","url":"https://www.exploit-db.com/exploits/44994"}],"fixes":[{"ecosystem":"Debian:12","package":"tor","fixed_in":["0.3.2.10-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"tor","fixed_in":["0.3.2.10-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"tor","fixed_in":["0.3.2.10-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"tor","fixed_in":["0.3.2.10-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-1"}]}]},{"source":"osv","ecosystem":"Mageia:6","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.9.15-1.mga6"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"tor","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"]},{"source":"osv","ecosystem":"SUSE:Package Hub 12","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-14.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Package Hub 12","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.2.10-14.1"}]}],"bundled":2},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.6.7-2.2"}]}],"bundled":22}],"products":[{"vendor":"torproject","product":"tor"}],"references":[{"url":"https://trac.torproject.org/projects/tor/ticket/24700","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Mitigation","Vendor Advisory","report"]},{"url":"https://trac.torproject.org/projects/tor/ticket/25117","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","Vendor Advisory","fix","report"]},{"url":"https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web","report"]},{"url":"https://www.exploit-db.com/exploits/44994/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-0491"},{"url":"https://github.com/advisories/GHSA-8wr4-7fjq-4qxw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-0491","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2018-0161.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=22690","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-0491","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-0491","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1083845","tags":["report"]},{"url":"https://bugzilla.suse.com/1083846","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0490","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0491","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1254","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0375","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0376","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0377","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-0380","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8819","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8820","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8821","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8822","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-8823","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-8955","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10592","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10593","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15572","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28089","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-28090","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34548","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34549","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34550","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-38385","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2018-0491","description":"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.","status":"published","published":"2018-03-05T15:00:00Z","modified":"2024-08-05T03:28:10.94Z","updated_at":"2026-11-02T14:35:12.160284Z"}],"euvd":[{"id":"EUVD-2018-1314","description":"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.","status":"published","published":"2018-03-05T15:00:00Z","modified":"2024-08-05T03:28:10Z","updated_at":"2026-11-03T02:40:18.31448Z"}],"ghsa":[{"id":"GHSA-8wr4-7fjq-4qxw","title":"A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers...","description":"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.","status":"published","published":"2022-05-14T01:15:18Z","modified":"2023-02-02T05:03:11Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:51:35.560043Z"}],"nvd":[{"id":"CVE-2018-0491","description":"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.","status":"published","published":"2018-03-05T15:29:00.27Z","modified":"2026-06-17T01:30:57Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:04:23.783914Z"}],"osv":[{"id":"CVE-2018-0491","description":"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.","status":"published","published":"2018-03-05T15:29:00.27Z","modified":"2026-10-24T10:30:22.804019511Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:07.192756Z"},{"id":"DEBIAN-CVE-2018-0491","description":"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.","status":"published","published":"2018-03-05T15:29:00.27Z","modified":"2026-10-23T18:03:17.085121409Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:29.988046Z"},{"id":"UBUNTU-CVE-2018-0491","description":"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.","status":"published","published":"2018-03-05T15:29:00Z","modified":"2025-09-08T16:44:37Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:16.154988Z"},{"id":"MGASA-2018-0161","title":"Updated tor packages fix security vulnerabilities","description":"A protocol-list handling bug that could be used to remotely crash\ndirectory authorities with a null-pointer exception (CVE-2018-0490).\n\nA bug can be remotely triggered in order to crash relays with a\nuse-after-free pattern (CVE-2018-0491).\n","status":"published","published":"2018-03-07T20:37:26Z","modified":"2026-04-16T06:25:38.707594489Z","updated_at":"2026-11-02T15:49:40.442238Z"},{"id":"openSUSE-SU-2018:0614-1","title":"Security update for tor","description":"This update for tor to version 0.3.2.10 fixes security issues and bugs.\n\nThe following vulnerabilities were fixed:\n\n- CVE-2018-0490: remote crash vulnerability against directory authorities (boo#1083845, TROVE-2018-001)\n- CVE-2018-0491: remote relay crash (boo#1083846, TROVE-2018-002)\n\nThis new upstream stable version also contains a new system for improved resistance to DoS attacks against relays and various other bug fixes.","status":"published","published":"2018-03-06T19:19:46Z","modified":"2026-02-04T03:11:39.019455Z","updated_at":"2026-11-02T16:58:30.39372Z"},{"id":"openSUSE-SU-2018:0620-1","title":"Security update for tor","description":"This update for tor to version 0.3.2.10 fixes security issues and bugs.\n\nThe following vulnerabilities were fixed:\n\n- CVE-2018-0490: remote crash vulnerability against directory authorities (boo#1083845, TROVE-2018-001)\n- CVE-2018-0491: remote relay crash (boo#1083846, TROVE-2018-002)\n\nThis new upstream stable version also contains a new system for improved resistance to DoS attacks against relays and various other bug fixes.","status":"published","published":"2018-03-06T19:19:46Z","modified":"2026-02-04T04:02:05.499138Z","updated_at":"2026-11-02T16:58:30.39372Z"},{"id":"openSUSE-SU-2024:11469-1","title":"tor-0.4.6.7-2.2 on GA media","description":"These are all security issues fixed in the tor-0.4.6.7-2.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:58:38.644616Z","updated_at":"2026-11-02T16:58:35.195147Z"}]}}