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CVE-2025-69421 is a NULL pointer dereference vulnerability in OpenSSL's PKCS#12 processing. When a malformed PKCS#12 file is processed, the PKCS12_item_decrypt_d2i_ex() function may dereference a NULL oct parameter without first validating it. The vulnerable condition can be reached when PKCS12_item_decrypt_d2i_ex() is invoked from PKCS12_unpack_p7encdata() while parsing crafted PKCS#12 content. Successful triggering causes the application using OpenSSL to crash. The issue is limited to denial of service and is not known to permit code execution or memory disclosure. Affected branches include OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1, and 1.0.2.
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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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33 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in OpenSSL addressed indirectly through upgraded third-party components in Tenable Security Center.
An OpenSSL vulnerability patched by upgrading to OpenSSL 3.6.1 in IPFire Core Update 200.
Unknown (listed among related OpenSSL CVEs, but not described in the content).
Low-severity OpenSSL null pointer dereference in PKCS#12 decryption handling, typically resulting in denial of service when parsing crafted PKCS#12 inputs.
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Every observed campaign linking this CVE to a named adversary.
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