CVE-2025-69420
Missing ASN1_TYPE validation in TS_RESP_verify_response() function
At a glance
- Severity
- HIGH 7.5
- EPSS
- EPSS 0.92 % · percentile 60 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- openssl
- NVD status
- Modified
Description
Issue summary: A type confusion vulnerability exists in the TimeStamp Response verification code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing a malformed TimeStamp Response file. Impact summary: An application calling TS_RESP_verify_response() with a malformed TimeStamp Response can be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service. The functions ossl_ess_get_signing_cert() and ossl_ess_get_signing_cert_v2() access the signing cert attribute value without validating its type. When the type is not V_ASN1_SEQUENCE, this results in accessing invalid memory through the ASN1_TYPE union, causing a crash. Exploiting this vulnerability requires an attacker to provide a malformed TimeStamp Response to an application that verifies timestamp responses. The TimeStamp protocol (RFC 3161) is not widely used and the impact of the exploit is just a Denial of Service. For these reasons the issue was assessed as Low severity. The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the TimeStamp Response implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue. OpenSSL 1.0.2 is not affected by this issue.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2025-206394
- GCVE · GCVE-0-2025-69420
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1351 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0962 — Multiples vulnérabilités dans les produits Tenable · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0905 — Multiples vulnérabilités dans Tenable Security Center · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0810 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0796 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0627 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0470 — Multiples vulnérabilités dans Oracle PeopleSoft · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0469 — Multiples vulnérabilités dans Oracle MySQL · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0315 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0281 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0209 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0199 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0096 — Multiples vulnérabilités dans OpenSSL · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 1.1.1 < 1.1.1zecpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.0.0 < 3.0.19cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.3.0 < 3.3.6cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.4.0 < 3.4.4cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.5.0 < 3.5.5cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*≥ 3.6.0 < 3.6.1
Affected products
| Product | Versions |
|---|---|
| OpenSSL · OpenSSL | affected 3.6.0 < 3.6.1 ; affected 3.5.0 < 3.5.5 ; affected 3.4.0 < 3.4.4 ; affected 3.3.0 < 3.3.6 ; affected 3.0.0 < 3.0.19 ; affected 1.1.1 < 1.1.1ze |
References
- https://openssl-library.org/news/secadv/20260127.txt
- https://github.com/openssl/openssl/commit/a99349ebfc519999edc50620abe24d599b9eb085
- https://github.com/openssl/openssl/commit/564fd9c73787f25693bf9e75faf7bf6bb1305d4e
- https://github.com/openssl/openssl/commit/27c7012c91cc986a598d7540f3079dfde2416eb9
- https://github.com/openssl/openssl/commit/5eb0770ffcf11b785cf374ff3c19196245e54f1b
- https://github.com/openssl/openssl/commit/4e254b48ad93cc092be3dd62d97015f33f73133a
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |