CVE-2009-0654
Tor 0.2.0.28, and probably 0.2.0.34 and earlier, allows remote attackers, with control of an entry router and an exit router, to confirm that a sender and receiver are communicating via vectors involving (1) replaying, (2) modifying, (3) inserting, or (4) deleting a single cell, and then observing cell recognition errors at the exit router. NOTE: the vendor disputes the significance of this issue, noting that the product's design "accepted end-to-end correlation as an attack that is too expensive to solve."
Key facts
- CVSS score
- 5.1 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P- EPSS score
- 2.4% (84th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-0657)
- Published
- February 20, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-0657 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.
View on the EU Vulnerability DatabaseAffected products
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
- tor / tor
References
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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