CVE-2009-0654
Tor 0.2.0.28, and probably 0.2.0.34 and earlier, allows remote attackers, with control of an...
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."
Exploit likelihood
What each source reports
NVD Score used
5.1
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."
- Record
CVE-2009-0654- CVSS 2.0
- 5.1 Medium
AV:N/AC:H/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2009-0654- Updated
- 2026-11-02
EUVDEUVD-2009-0657 No score
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."
- Record
EUVD-2009-0657- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-39qj-vvc5-79wf No score
Tor 0.2.0.28, and probably 0.2.0.34 and earlier, allows remote attackers, with control of an...
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."
- Record
GHSA-39qj-vvc5-79wf- Updated
- 2026-11-02
OSV No score
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."
- Record
CVE-2009-0654- Updated
- 2026-11-02
OSVDEBIAN-CVE-2009-0654 No score
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."
- Record
DEBIAN-CVE-2009-0654- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
torDebian:12 |
All versions, plus listed versions 0.4.7.13-10.4.7.16-10.4.8.10-10.4.8.10-1~bpo11+10.4.8.10-1~bpo12+1 Show 45 moreShow less0.4.8.11-10.4.8.11-1~bpo11+10.4.8.11-1~bpo12+10.4.8.12-10.4.8.12-1.10.4.8.12-1~bpo11+10.4.8.12-1~bpo12+10.4.8.13-10.4.8.13-20.4.8.13-2~bpo12+10.4.8.14-10.4.8.14-1~bpo12+10.4.8.16-10.4.8.21-10.4.8.21-1~bpo12+10.4.8.21-1~bpo13+10.4.8.21-1~bpo13+20.4.8.22-10.4.8.22-1~bpo12+10.4.8.22-1~bpo13+10.4.8.4-20.4.8.5-10.4.8.6-10.4.8.7-10.4.8.8-10.4.8.9-10.4.8.9-1~bpo11+10.4.8.9-1~bpo12+10.4.9.11-0+deb12u10.4.9.11-10.4.9.11-1~bpo13+10.4.9.12-20.4.9.12-30.4.9.12-40.4.9.13-10.4.9.14-10.4.9.5-10.4.9.5-20.4.9.5-2~bpo12+10.4.9.5-2~bpo13+10.4.9.6-0+deb12u10.4.9.6-10.4.9.6-1~bpo12+10.4.9.6-1~bpo13+10.4.9.8-0+deb12u1 |
None known |
torDebian:13 |
All versions, plus listed versions 0.4.8.16-10.4.8.21-10.4.8.21-1~bpo12+10.4.8.21-1~bpo13+10.4.8.21-1~bpo13+2 Show 29 moreShow less0.4.8.22-10.4.8.22-1~bpo12+10.4.8.22-1~bpo13+10.4.9.11-0+deb13u10.4.9.11-10.4.9.11-1~bpo13+10.4.9.12-0+deb13u10.4.9.12-0+deb13u20.4.9.12-20.4.9.12-30.4.9.12-40.4.9.13-0+deb13u10.4.9.13-10.4.9.14-0+deb13u10.4.9.14-10.4.9.5-10.4.9.5-20.4.9.5-2~bpo12+10.4.9.5-2~bpo13+10.4.9.6-0+deb13u10.4.9.6-10.4.9.6-1~bpo12+10.4.9.6-1~bpo13+10.4.9.8-0+deb13u10.4.9.8-10.4.9.8-1~bpo12+10.4.9.8-1~bpo13+10.4.9.9-10.4.9.9-1~bpo13+1 |
None known |
torDebian:14 |
All versions, plus listed versions 0.4.8.16-10.4.8.21-10.4.8.21-1~bpo12+10.4.8.21-1~bpo13+10.4.8.21-1~bpo13+2 Show 22 moreShow less0.4.8.22-10.4.8.22-1~bpo12+10.4.8.22-1~bpo13+10.4.9.11-10.4.9.11-1~bpo13+10.4.9.12-20.4.9.12-30.4.9.12-40.4.9.13-10.4.9.14-10.4.9.5-10.4.9.5-20.4.9.5-2~bpo12+10.4.9.5-2~bpo13+10.4.9.6-10.4.9.6-1~bpo12+10.4.9.6-1~bpo13+10.4.9.8-10.4.9.8-1~bpo12+10.4.9.8-1~bpo13+10.4.9.9-10.4.9.9-1~bpo13+1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-0654 is a medium vulnerability (CVSS 5.1) in Tor, published February 20, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.39%, the 84th percentile. No source names a fixed version.
References
Left out here: 5 versions. The JSON record has them.