The rend_service_intro_established function in or/rendservice.c in Tor before 0.2.8.15, 0.2.9.x before 0.2.9.12, 0.3.0.x before 0.3.0.11, 0.3.1.x before 0.3.1.7, and 0.3.2.x before 0.3.2.1-alpha, when SafeLogging is disabled, allows attackers to obtain sensitive information by leveraging access to the log files of a hidden service, because uninitialized stack data is included in an error message about construction of an introduction point circuit
Published Sep 18, 2017
5.9
MEDIUMCVSS 3.0
EPSS 1.54%
Description
The rend_service_intro_established function in or/rendservice.c in Tor before 0.2.8.15, 0.2.9.x before 0.2.9.12, 0.3.0.x before 0.3.0.11, 0.3.1.x before 0.3.1.7, and 0.3.2.x before 0.3.2.1-alpha, when SafeLogging is disabled, allows attackers to obtain sensitive information by leveraging access to the log files of a hidden service, because uninitialized stack data is included in an error message about construction of an introduction point circuit.
Affected products
- Vendor n/a Product Tor before 0.3.1.7 Defaultn/a
- Version Tor before 0.3.1.7StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Tor before 0.3.1.7 | n/a |
|
- ≤ 0.2.8.14
- 0.2.9.0
- 0.2.9.0
- 0.2.9.1
- 0.2.9.2
- 0.2.9.3
- 0.2.9.4
- 0.2.9.5
- 0.2.9.6
- 0.2.9.8
- 0.2.9.9
- 0.2.9.10
- 0.2.9.11
- 0.3.0.0
- 0.3.0.1
- 0.3.0.2
- 0.3.0.3
- 0.3.0.4
- 0.3.0.5
- 0.3.0.6
- 0.3.0.7
- 0.3.0.8
- 0.3.0.9
- 0.3.0.10
- 0.3.1.1
- 0.3.1.2
- 0.3.1.3
- 0.3.1.4
- 0.3.1.5
- 0.3.1.6
- 0.3.2
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.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.54% (0.01541) | 74.01th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.54% (0.01541) | 73.80th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.25% (0.00254) | 65.71th | v3 (v2023.03.01) |
| Mar 13, 2024 | 0.25% (0.00254) | 64.63th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.25% (0.00254) | 62.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00263) | 62.16th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (4)
- http://www.debian.org/security/2017/dsa-3993 vendor-advisoryx_refsource_DEBIAN
- http://www.securitytracker.com/id/1039519 vdb-entryx_refsource_SECTRACK
- https://github.com/torproject/tor/commit/09ea89764a4d3a907808ed7d4fe42abfe64bd486 x_refsource_CONFIRMPatchThird Party Advisory
- https://trac.torproject.org/projects/tor/ticket/23490 x_refsource_CONFIRMMitigationPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3993 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securitytracker.com/id/1039519 | vdb-entryx_refsource_SECTRACK | |
| https://github.com/torproject/tor/commit/09ea89764a4d3a907808ed7d4fe42abfe64bd486 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://trac.torproject.org/projects/tor/ticket/23490 | x_refsource_CONFIRMMitigationPatchVendor Advisory |
Change history (0)
No recorded changes yet.