CVE-2025-69420

Aliases:DEBIAN-CVE-2025-69420ALPINE-CVE-2025-69420UBUNTU-CVE-2025-69420CGA-8h52-q2fx-gx4pCGA-p8fj-r6mr-jjjjCGA-52c2-876m-89g9CGA-5h5c-g3f9-8v93CGA-7wxf-g89h-23vqCGA-84pc-r3vp-77rwCGA-9c29-h578-w6xmCGA-cp39-jj23-xrwxCGA-gf43-gpcw-45jwCGA-j273-7jpx-7h3xCGA-j2f8-6c84-xqr7CGA-x9vq-2qj6-px5q
Advisory lineage Upstream: 0 Downstream: 29
Modified
Published: 27 Jan 2026, 16:01
Last modified:12 May 2026, 12:08

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.81% LOW
1% probability +0.51%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Jan 2026, 16:01
Published
Vulnerability first disclosed
12 May 2026, 12:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.81%• Percentile: 56%

Techniques & Countermeasures

  • CWE-754•Improper Check for Unusual or Exceptional Conditions

    The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

Affected Systems

  • alpine•openssl

    ≥ 1.1.1, < 3.0.19-r0 | ≥ 1.1.1, < 3.3.6-r0 | ≥ 1.1.1, < 3.3.6-r0 | ≥ 1.1.1, < 3.5.5-r0 | ≥ 1.1.1, < 3.5.5-r0 | ≥ 1.1.1, < 3.5.5-r0

  • chainguard•libcrypto3-2.34

    < 3.6.1-r0

  • chainguard•openssl

    < 3.6.1-r0

  • chainguard•openssl-provider-fips

    < 0

  • chainguard•openssl-provider-fips-3.1.2

    < 0

  • chainguard•openssl-provider-fips-3.4.0

    < 0

  • chainguard•openssl-provider-fips-3.6.0

    < 0

  • wolfi•openssl

    < 3.6.1-r0

  • debian•openssl

    < 1.1.1w-0+deb11u5 | < 3.0.18-1~deb12u2 | < 3.5.4-1~deb13u2 | < 3.5.5-1

  • ubuntu•nodejs

    all

  • ubuntu•openssl

    < 1.1.1-1ubuntu2.1~18.04.23+esm7 | < 1.1.1-1ubuntu2.fips.2.1~18.04.23.7 | all | < 1.1.1f-1ubuntu2.24+esm2 | < 1.1.1f-1ubuntu2.fips.24.2 | < 3.0.2-0ubuntu1.21 | < 3.0.2-0ubuntu1.21+Fips1 | < 3.0.13-0ubuntu3.7 | < 3.5.3-1ubuntu3 | < 3.5.5-1ubuntu1

  • ubuntu•openssl-fips

    all | < 3.0.13-0ubuntu3.12+Fips1

  • openssl•openssl

    ≥ 1.1.1, < 1.1.1ze | ≥ 3.0.0, < 3.0.19 | ≥ 3.3.0, < 3.3.6 | ≥ 3.4.0, < 3.4.4 | ≥ 3.5.0, < 3.5.5 | ≥ 3.6.0, < 3.6.1

References (15)