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CVE-2025-69421 is a NULL pointer dereference in OpenSSL PKCS#12 processing. The PKCS12_item_decrypt_d2i_ex() function dereferences its oct parameter without first verifying that it is non-NULL. A malformed PKCS#12 file processed through PKCS12_unpack_p7encdata() can cause this parameter to be NULL, crashing the application. OpenSSL versions 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1, and 1.0.2 are affected; the PKCS#12 implementation is outside the OpenSSL FIPS module boundary.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a small, self-contained proof-of-concept reproducer for CVE-2025-69421 affecting OpenSSL PKCS#12 parsing. It is not part of a larger exploit framework. The repo contains 5 files: a README with technical explanation and usage, a Makefile with helper targets, generate.py to construct the malformed DER-encoded PKCS#12/PFX artifact, and run.sh to execute a vulnerable OpenSSL binary against that artifact under sanitizer-friendly settings. The core exploit capability is denial of service only: generate.py manually builds ASN.1/DER structures for a PFX where EncryptedData -> EncryptedContentInfo intentionally omits the optional encryptedContent field. According to the included documentation and code comments, vulnerable OpenSSL versions can propagate a NULL ASN1_OCTET_STRING from PKCS12_unpack_p7encdata() into PKCS12_item_decrypt_d2i_ex(), causing a NULL pointer dereference. The helper script run.sh does not attack a remote service; it locally invokes the specified openssl binary with pkcs12 parsing options against malformed-cve-2025-69421.p12 using pass:test. No network communication, callback infrastructure, persistence, or post-exploitation logic is present. This is a crash-only local/file-based PoC intended for defensive validation and regression testing.
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A network-reachable, low-complexity vulnerability requiring no privileges or user interaction that affects availability only, with high availability impact according to the supplied CVSS vector.
An OpenSSL NULL-pointer dereference in PKCS#12 processing that lets an attacker cause denial of service by supplying a malformed PKCS#12 file to a vulnerable application. OpenSSL versions 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1, and 1.0.2 are stated to be affected; the referenced FIPS modules are not affected.
A network-exploitable vulnerability with low attack complexity and no required privileges or user interaction that can compromise availability; the supplied record identifies it as affecting the TuxCare/CentOS 8.5 patch context.
A vulnerability addressed by the EulerOS_SA-2026-3535 OpenSSL package update; no technical flaw details are provided.
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Cross-references every affected SKU, including bundled OEM variants.
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