MEDIUM
Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoing OR connection, which allows remote relays to bypass intended anonymity properties by reading this chain and then determining the set of entry guards that the client or bridge had selected
Published Dec 23, 2011
5.8
MEDIUMCVSS 2.0
EPSS 0.72%
Description
Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoing OR connection, which allows remote relays to bypass intended anonymity properties by reading this chain and then determining the set of entry guards that the client or bridge had selected.
Affected products
No data.
OR
- ≤ 0.2.2.33
- 0.0.2
- 0.0.3
- 0.0.4
- 0.0.5
- 0.0.6
- 0.0.6.1
- 0.0.6.2
- 0.0.7
- 0.0.7.1
- 0.0.7.2
- 0.0.7.3
- 0.0.8
- 0.0.8.1
- 0.0.9
- 0.0.9.1
- 0.0.9.2
- 0.0.9.3
- 0.0.9.4
- 0.0.9.5
- 0.0.9.6
- 0.0.9.7
- 0.0.9.8
- 0.0.9.9
- 0.0.9.10
- 0.1.0.1
- 0.1.0.2
- 0.1.0.3
- 0.1.0.4
- 0.1.0.5
- 0.1.0.6
- 0.1.0.7
- 0.1.0.8
- 0.1.0.9
- 0.1.0.10
- 0.1.0.11
- 0.1.0.12
- 0.1.0.13
- 0.1.0.14
- 0.1.0.15
- 0.1.0.16
- 0.1.0.17
- 0.1.0.18
- 0.1.0.19
- 0.1.1
- 0.1.1.1
- 0.1.1.1
- 0.1.1.2
- 0.1.1.2
- 0.1.1.3
- 0.1.1.3
- 0.1.1.4
- 0.1.1.4
- 0.1.1.5
- 0.1.1.5
- 0.1.1.6
- 0.1.1.6
- 0.1.1.7
- 0.1.1.7
- 0.1.1.8
- 0.1.1.8
- 0.1.1.9
- 0.1.1.9
- 0.1.1.10
- 0.1.1.10
- 0.1.1.11
- 0.1.1.12
- 0.1.1.13
- 0.1.1.14
- 0.1.1.15
- 0.1.1.16
- 0.1.1.17
- 0.1.1.18
- 0.1.1.19
- 0.1.1.20
- 0.1.1.21
- 0.1.1.22
- 0.1.1.23
- 0.1.1.25
- 0.1.1.26
- 0.1.2.1
- 0.1.2.1
- 0.1.2.2
- 0.1.2.3
- 0.1.2.4
- 0.1.2.5
- 0.1.2.5
- 0.1.2.6
- 0.1.2.7
- 0.1.2.8
- 0.1.2.9
- 0.1.2.10
- 0.1.2.11
- 0.1.2.12
- 0.1.2.13
- 0.1.2.14
- 0.1.2.15
- 0.1.2.16
- 0.1.2.17
- 0.1.2.18
- 0.1.2.19
- 0.1.2.30
- 0.1.2.31
- 0.2.0.1
- 0.2.0.2
- 0.2.0.3
- 0.2.0.4
- 0.2.0.5
- 0.2.0.6
- 0.2.0.7
- 0.2.0.8
- 0.2.0.9
- 0.2.0.10
- 0.2.0.11
- 0.2.0.12
- 0.2.0.13
- 0.2.0.14
- 0.2.0.15
- 0.2.0.16
- 0.2.0.17
- 0.2.0.18
- 0.2.0.19
- 0.2.0.20
- 0.2.0.21
- 0.2.0.22
- 0.2.0.23
- 0.2.0.24
- 0.2.0.25
- 0.2.0.26
- 0.2.0.27
- 0.2.0.28
- 0.2.0.29
- 0.2.0.29
- 0.2.0.30
- 0.2.0.30
- 0.2.0.31
- 0.2.0.31
- 0.2.0.32
- 0.2.0.33
- 0.2.0.34
- 0.2.0.35
- 0.2.1.1
- 0.2.1.1.1
- 0.2.1.1.2
- 0.2.1.1.3
- 0.2.1.1.4
- 0.2.1.1.5
- 0.2.1.1.6
- 0.2.1.1.7
- 0.2.1.1.8
- 0.2.1.1.9
- 0.2.1.1.10
- 0.2.1.1.11
- 0.2.1.1.12
- 0.2.1.1.12
- 0.2.1.1.13
- 0.2.1.1.14
- 0.2.1.1.15
- 0.2.1.1.16
- 0.2.1.1.17
- 0.2.1.1.18
- 0.2.1.1.19
- 0.2.1.1.20
- 0.2.1.1.21
- 0.2.1.1.22
- 0.2.1.1.23
- 0.2.1.1.24
- 0.2.1.1.25
- 0.2.1.1.26
- 0.2.1.1.27
- 0.2.1.1.28
- 0.2.1.2
- 0.2.1.3
- 0.2.1.4
- 0.2.1.5
- 0.2.1.6
- 0.2.1.7
- 0.2.1.8
- 0.2.1.9
- 0.2.1.10
- 0.2.1.11
- 0.2.1.12
- 0.2.1.12
- 0.2.1.13
- 0.2.1.14
- 0.2.1.15
- 0.2.1.16
- 0.2.1.17
- 0.2.1.18
- 0.2.1.19
- 0.2.1.20
- 0.2.1.21
- 0.2.1.22
- 0.2.1.23
- 0.2.1.24
- 0.2.1.25
- 0.2.1.26
- 0.2.1.27
- 0.2.1.28
- 0.2.1.29
- 0.2.2.1
- 0.2.2.1
- 0.2.2.2
- 0.2.2.2
- 0.2.2.3
- 0.2.2.3
- 0.2.2.4
- 0.2.2.4
- 0.2.2.5
- 0.2.2.5
- 0.2.2.6
- 0.2.2.6
- 0.2.2.7
- 0.2.2.8
- 0.2.2.9
- 0.2.2.10
- 0.2.2.11
- 0.2.2.12
- 0.2.2.13
- 0.2.2.14
- 0.2.2.15
- 0.2.2.16
- 0.2.2.17
- 0.2.2.18
- 0.2.2.19
- 0.2.2.20
- 0.2.2.29
- 0.2.2.29
- 0.2.2.32
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
5.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.72% 0.00723
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00723
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.72% (0.00723) | 52.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.77% (0.00766) | 50.51th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.14% (0.00137) | 31.04th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00104) | 44.35th | v3 (v2023.03.01) |
| Jun 28, 2024 | 0.10% (0.00104) | 43.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00104) | 41.00th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
Weaknesses (1)
References (2)
- http://www.debian.org/security/2011/dsa-2331 vendor-advisoryx_refsource_DEBIAN
- https://blog.torproject.org/blog/tor-02234-released-security-patches x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2011/dsa-2331 | vendor-advisoryx_refsource_DEBIAN | |
| https://blog.torproject.org/blog/tor-02234-released-security-patches | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 23, 2011
Updated Aug 6, 2024
Reserved Jul 19, 2011
Link CVE-2011-2768
CISA Vulnrichment
Updated n/a