CVE-2025-69420
High · 7.5CVSS
7.5
EPSS
0.9%
Published
Jan 27, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| AlmaLinux:10 | openssl | 0 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-devel | 0 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-libs | 0 | 1:3.5.1-7.el10_1.alma.1 |
| AlmaLinux:10 | openssl-perl | 0 | 1:3.5.1-7.el10_1.alma.1 |
| Chainguard | libcrypto3-2.34 | 0 | 3.6.1-r0 |
| Chainguard | openssl | 0 | 3.6.1-r0 |
| Chainguard | openssl-provider-fips | 0 | 0 |
| Chainguard | openssl-provider-fips-3.1.2 | 0 | 0 |
| Chainguard | openssl-provider-fips-3.4.0 | 0 | 0 |
| Chainguard | openssl-provider-fips-3.6.0 | 0 | 0 |
| Mageia:9 | openssl | 0 | 3.0.19-1.mga9 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise Micro 5.3 | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Micro 5.4 | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | openssl-3 | 0 | 3.2.3-150700.5.24.1 |
| SUSE:Linux Enterprise Module for Legacy 15 SP7 | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-1_1 | 0 | 1.1.1w-150600.5.21.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | openssl-3 | 0 | 3.1.4-150600.5.42.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | openssl-3 | 0 | 3.0.8-150400.4.78.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | openssl-3 | 0 | 3.0.8-150500.5.57.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-1_1 | 0 | 1.1.1w-150600.5.21.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | openssl-3 | 0 | 3.1.4-150600.5.42.1 |
| Wolfi | openssl | 0 | 3.6.1-r0 |
| openSUSE:Leap 15.6 | openssl-1_0_0 | 0 | 1.0.2p-150000.3.102.1 |
| openSUSE:Leap 15.6 | openssl-1_1 | 0 | 1.1.1w-150600.5.21.1 |
| openSUSE:Leap 15.6 | openssl-3 | 0 | 3.1.4-150600.5.42.1 |
| openSUSE:Leap 16.0 | openssl-3 | 0 | 3.5.0-160000.5.1 |
| openSUSE:Tumbleweed | openssl-3 | 0 | 3.5.3-2.1 |
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