Vulnerability Description
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."
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tor | Tor | <= 0.2.0.34 |
References
- http://blog.torproject.org/blog/one-cell-enough
- http://www.blackhat.com/html/bh-dc-09/bh-dc-09-archives.html#Fu
- http://www.blackhat.com/presentations/bh-dc-09/Fu/BlackHat-DC-09-Fu-Break-Tors-AExploit
- http://blog.torproject.org/blog/one-cell-enough
- http://www.blackhat.com/html/bh-dc-09/bh-dc-09-archives.html#Fu
- http://www.blackhat.com/presentations/bh-dc-09/Fu/BlackHat-DC-09-Fu-Break-Tors-AExploit
FAQ
What is CVE-2009-0654?
CVE-2009-0654 is a vulnerability with a CVSS score of 5.1 (MEDIUM). 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 involv...
How severe is CVE-2009-0654?
CVE-2009-0654 has been rated MEDIUM with a CVSS base score of 5.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2009-0654?
Check the references section above for vendor advisories and patch information. Affected products include: Tor Tor.