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."
                
            Metrics
Affected Vendors & Products
References
        History
                    Wed, 28 May 2025 14:45:00 +0000
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 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: mitre
Published: 2009-02-20T19:00:00Z
Updated: 2024-09-17T03:13:48.226Z
Reserved: 2009-02-20T00:00:00Z
Link: CVE-2009-0654
 Vulnrichment
                        Vulnrichment
                    No data.
 NVD
                        NVD
                    Status : Deferred
Published: 2009-02-20T19:30:00.313
Modified: 2025-04-09T00:30:58.490
Link: CVE-2009-0654
 Redhat
                        Redhat