{"cve":"CVE-2006-6893","nvd":{"published":"2006-12-31T05:00:00.000","modified":"2026-06-16T22:34:00.133","status":"Modified","description":"Tor allows remote attackers to discover the IP address of a hidden service by accessing this service at a high rate, thereby changing the server's CPU temperature and consequently changing the pattern of time values visible through (1) ICMP timestamps, (2) TCP sequence numbers, and (3) TCP timestamps, a different vulnerability than CVE-2006-0414. NOTE: it could be argued that this is a laws-of-physics vulnerability that is a fundamental design limitation of certain hardware implementations, so perhaps this issue should not be included in CVE.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://events.ccc.de/congress/2006/Fahrplan/events/1513.en.html","http://www.cl.cam.ac.uk/~sjm217/papers/ccs06hotornot.pdf","http://www.lightbluetouchpaper.org/2006/09/04/hot-or-not-revealing-hidden-services-by-their-clock-skew/","http://events.ccc.de/congress/2006/Fahrplan/events/1513.en.html","http://www.cl.cam.ac.uk/~sjm217/papers/ccs06hotornot.pdf"],"products":["tor:tor"],"source":"nvd","synced_at":"2026-10-19T19:44:49.019236172+00:00"},"epss":{"cve":"CVE-2006-6893","score":0.02508,"percentile":0.84759,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}