🛡️ AZL-75585 — openssl

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2025-69420 affecting package openssl for versions less than 1.1.1k-38

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.

Affected software

AZL-75585 is recorded against 1 package.

  • openssl (fixed in 1.1.1k-38)

Timeline and source

Published on 27 January 2026 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-01-27
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
openssl — 1.1.1k-38

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