CVE-2009-0654

Public Exploit

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."

5.1

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 0.49%

Affected: n/a n/a

References

Link	Tags
http://www.blackhat.com/presentations/bh-dc-09/Fu/BlackHat-DC-09-Fu-Break-Tors-Anonymity.pdf	exploit
http://www.blackhat.com/html/bh-dc-09/bh-dc-09-archives.html#Fu
http://blog.torproject.org/blog/one-cell-enough

Frequently Asked Questions

What is the severity of CVE-2009-0654?: CVE-2009-0654 has been scored as a medium severity vulnerability.
How to fix CVE-2009-0654?: To fix CVE-2009-0654, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-0654 being actively exploited in the wild?: It is possible that CVE-2009-0654 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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