{"id":"CVE-2018-0491","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-0491","generatedAt":"2026-10-29T02:03:39.684Z","title":"A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10.","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.","published":"2018-03-05T15:29:00.000Z","lastModified":"2026-06-17T01:30:57.000Z","status":"Modified","sourceIdentifier":"security@debian.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-416"],"affected":["torproject/tor"],"epss":{"score":0.1479,"percentile":0.96665,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.1246,"percentile":0.96091},{"date":"2026-09-22","score":0.1479,"percentile":0.96527}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2018-07-09","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":44994,"kind":"exploit","title":"Tor Browser < 0.3.2.10 - Use After Free (PoC)","url":"https://www.exploit-db.com/exploits/44994","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/44994.html","file":"exploits/linux/dos/44994.html","published":"2018-07-09","added":"2018-07-09","updated":"2020-06-18","author":"t4rkd3vilz","type":"dos","platform":"linux","port":null,"verified":false,"codes":["CVE-2018-0491"],"tags":"Use After Free (UAF)","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 14.8%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915","tags":["Vendor Advisory"],"source":"security@debian.org"},{"url":"https://trac.torproject.org/projects/tor/ticket/24700","tags":["Issue Tracking","Mitigation","Vendor Advisory"],"source":"security@debian.org"},{"url":"https://trac.torproject.org/projects/tor/ticket/25117","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"security@debian.org"},{"url":"https://www.exploit-db.com/exploits/44994/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security@debian.org"},{"url":"https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://trac.torproject.org/projects/tor/ticket/24700","tags":["Issue Tracking","Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://trac.torproject.org/projects/tor/ticket/25117","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/44994/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-0491","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}