CVE-2025-69420
Missing ASN1_TYPE validation in TS_RESP_verify_response() function
CVSS v3
7.5
HIGH
EPSS Score
0.3 %
exploit probability
CISA KEV
No
known exploited
Exploitation
none
SSVC status
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 oss
Technical details
- CVSS v3 Vector
- 3.1
- Published
- 2026-01-27
- Last Modified
- 2026-02-02
Frequently asked questions
What is CVE-2025-69420?
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 oss
Is CVE-2025-69420 actively exploited?
Active exploitation of CVE-2025-69420 has not been confirmed. The EPSS score is 0.3%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-69420?
CVE-2025-69420 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string 3.1.
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