Null pointer dereference in PKCS12 parsing
Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL to crash leading to a potential Denial of Service attack
Impact summary: Applications loading files in the PKCS12 format from untrusted sources might terminate abruptly.
A file in PKCS12 format can contain certificates and keys and may come from an untrusted source. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly check for this case. This can lead to a NULL pointer dereference that results in OpenSSL crashing. If an application processes PKCS12 files from an untrusted source using the OpenSSL APIs then that application will be vulnerable to this issue.
OpenSSL APIs that are vulnerable to this are: PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes() and PKCS12_newpass().
We have also fixed a similar issue in SMIME_write_PKCS7(). However since this function is related to writing data we do not consider it security significant.
The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | cryptography | < 42.0.2 | 42.0.2 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2024-0727
- https://github.com/github/advisory-database/pull/3472
- https://github.com/openssl/openssl/pull/23362
- https://github.com/alexcrichton/openssl-src-rs/commit/add20f73b6b42be7451af2e1044d4e0e778992b2
- https://github.com/openssl/openssl/commit/09df4395b5071217b76dc7d3d2e630eb8c5a79c2
- https://github.com/openssl/openssl/commit/775acfdbd0c6af9ac855f34969cdab0c0c90844a
- https://github.com/openssl/openssl/commit/d135eeab8a5dbf72b3da5240bab9ddb7678dbd2c
- https://github.com/pyca/cryptography/commit/3519591d255d4506fbcd0d04037d45271903c64d
- https://www.openssl.org/news/secadv/20240125.txt
- https://security.netapp.com/advisory/ntap-20240208-0006
- https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html
- https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html
- https://github.openssl.org/openssl/extended-releases/commit/aebaa5883e31122b404e450732dc833dc9dee539
- https://github.openssl.org/openssl/extended-releases/commit/03b3941d60c4bce58fab69a0c22377ab439bc0e8
- https://cert-portal.siemens.com/productcert/html/ssa-915275.html
- https://cert-portal.siemens.com/productcert/html/ssa-769027.html
- https://cert-portal.siemens.com/productcert/html/ssa-331112.html
- https://cert-portal.siemens.com/productcert/html/ssa-277137.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- http://www.openwall.com/lists/oss-security/2024/03/11/1
- https://pypi.org/project/cryptography
- https://github.com/advisories/GHSA-9v9h-cgj8-h64p
- Vector CVSS
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H- Debilidad (CWE)
CWE-476- Plataforma
- Python (PyPI)
- Paquete
cryptography- Publicada
- 26.01.2024
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1285 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-9v9h-cgj8-h64p - CC BY 4.0
Historial de vulnerabilidades: cryptography
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 24
- Primera → última
- 03.2017 08.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 12
- Media 7
- Baja 5
Divulgaciones por año
- 2017: 1
- 2018: 1
- 2019: 0
- 2020: 1
- 2021: 1
- 2022: 1
- 2023: 7
- 2024: 4
- 2025: 1
- 2026: 7
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Null pointer dereference in PKCS12 parsing esta entrada
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