LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result, in a use case where a user-provided verification callback returns 1, as demonstrated by acceptance of invalid certificates by nginx
Published Apr 27, 2017
5.3
MEDIUMCVSS 3.0
EPSS 1.02%
Description
LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result, in a use case where a user-provided verification callback returns 1, as demonstrated by acceptance of invalid certificates by nginx.
Affected products
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:R/S:U/C:N/I:H/A:N
AV:N/AC:H/Au:N/C:N/I:P/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.02% (0.01021) | 62.10th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.02% (0.01021) | 61.90th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.21% (0.00209) | 59.33th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.21% (0.00209) | 58.15th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00157) | 50.29th | 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://seclists.org/oss-sec/2017/q2/145 x_refsource_MISCMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/98076 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://github.com/libressl-portable/portable/issues/307 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://trac.nginx.org/nginx/ticket/1257 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://seclists.org/oss-sec/2017/q2/145 | x_refsource_MISCMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/98076 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://github.com/libressl-portable/portable/issues/307 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://trac.nginx.org/nginx/ticket/1257 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory |
Change history (0)
No recorded changes yet.