OpenSSL, probably 0.9.6, does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack, a related issue to CVE-2002-0970
Published Feb 20, 2009
7.5
HIGHCVSS 2.0
EPSS 1.15%
Description
OpenSSL, probably 0.9.6, does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack, a related issue to CVE-2002-0970.
Affected products
Remediation
Red Hat statement
Not vulnerable. This issue was addressed in upstream OpenSSL prior to 0.9.6 and therefore does not affect the versions of OpenSSL as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5.
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:P/A:P
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.15% (0.01148) | 65.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.15% (0.01148) | 62.58th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.26% (0.00260) | 47.35th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.26% (0.00256) | 65.93th | v3 (v2023.03.01) |
| May 10, 2024 | 0.29% (0.00291) | 68.90th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.27% (0.00273) | 67.61th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.24% (0.00245) | 63.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00256) | 61.65th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
References (5)
- http://www.blackhat.com/html/bh-dc-09/bh-dc-09-speakers.html#Marlinspike x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2009-0653 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2009-0653
- https://www.blackhat.com/presentations/bh-dc-09/Marlinspike/BlackHat-DC-09-Marlinspike-Defeating-SSL.pdf x_refsource_MISCExploit
- https://www.cve.org/CVERecord?id=CVE-2009-0653
Change history (0)
No recorded changes yet.