Tor before 0.1.1.20 uses OpenSSL pseudo-random bytes (RAND_pseudo_bytes) instead of cryptographically strong RAND_bytes, and seeds the entropy value at start-up with 160-bit chunks without reseeding, which makes it easier for attackers to conduct brute force guessing attacks
Published Jul 7, 2006
5.0
MEDIUMCVSS 2.0
EPSS 1.66%
Description
Tor before 0.1.1.20 uses OpenSSL pseudo-random bytes (RAND_pseudo_bytes) instead of cryptographically strong RAND_bytes, and seeds the entropy value at start-up with 160-bit chunks without reseeding, which makes it easier for attackers to conduct brute force guessing attacks.
Affected products
No data.
- 0.0.2
- 0.0.2_pre13
- 0.0.2_pre14
- 0.0.2_pre15
- 0.0.2_pre16
- 0.0.2_pre17
- 0.0.2_pre18
- 0.0.2_pre19
- 0.0.2_pre20
- 0.0.2_pre21
- 0.0.2_pre22
- 0.0.2_pre23
- 0.0.2_pre24
- 0.0.2_pre25
- 0.0.2_pre26
- 0.0.2_pre27
- 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
- 0.1.1.1_alpha
- 0.1.1.2_alpha
- 0.1.1.3_alpha
- 0.1.1.4_alpha
- 0.1.1.5_alpha
- 0.1.1.6_alpha
- 0.1.1.7_alpha
- 0.1.1.8_alpha
- 0.1.1.9_alpha
- 0.1.1.10_alpha
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.
AV:N/AC:L/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 2, 2026.
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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.66% (0.01656) | 75.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.63% (0.01625) | 72.96th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.33% (0.00330) | 53.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.38% (0.00384) | 73.95th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.18% (0.00176) | 54.12th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.13% (0.00127) | 46.30th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.12% (0.00116) | 44.16th | v3 (v2023.03.01) |
| Nov 29, 2023 | 0.38% (0.00384) | 70.13th | v3 (v2023.03.01) |
| May 10, 2023 | 0.36% (0.00360) | 68.08th | v3 (v2023.03.01) |
| Apr 2, 2023 | 0.32% (0.00317) | 65.78th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.31% (0.00312) | 65.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
No CWE recorded.
References (4)
- http://secunia.com/advisories/20514 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://security.gentoo.org/glsa/glsa-200606-04.xml vendor-advisoryx_refsource_GENTOO
- http://tor.eff.org/cvs/tor/ChangeLog x_refsource_CONFIRM
- http://www.osvdb.org/25880 vdb-entryx_refsource_OSVDB
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/20514 | third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory | |
| http://security.gentoo.org/glsa/glsa-200606-04.xml | vendor-advisoryx_refsource_GENTOO | |
| http://tor.eff.org/cvs/tor/ChangeLog | x_refsource_CONFIRM | |
| http://www.osvdb.org/25880 | vdb-entryx_refsource_OSVDB |
Change history (0)
No recorded changes yet.