// For flags

CVE-2024-0727

PKCS12 Decoding crashes

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Resumen del problema: el procesamiento de un archivo PKCS12 con formato malintencionado puede hacer que OpenSSL falle y provoque un posible ataque de denegación de servicio. Resumen de impacto: las aplicaciones que cargan archivos en formato PKCS12 desde fuentes que no son de confianza pueden finalizar abruptamente. Un archivo en formato PKCS12 puede contener certificados y claves y puede provenir de una fuente que no es de confianza. La especificación PKCS12 permite que ciertos campos sean NULL, pero OpenSSL no verifica correctamente este caso. Esto puede provocar una desreferencia del puntero NULL que provoque el bloqueo de OpenSSL. Si una aplicación procesa archivos PKCS12 de una fuente que no es de confianza utilizando las API de OpenSSL, esa aplicación será vulnerable a este problema. Las API de OpenSSL que son vulnerables a esto son: PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes() y PKCS12_newpass(). También solucionamos un problema similar en SMIME_write_PKCS7(). Sin embargo, dado que esta función está relacionada con la escritura de datos, no la consideramos importante para la seguridad. Los módulos FIPS en 3.2, 3.1 y 3.0 no se ven afectados por este problema.

A flaw was found in OpenSSL. The optional ContentInfo fields can be set to null, even if the "type" is a valid value, which can lead to a null dereference error that may cause a denial of service.

*Credits: Bahaa Naamneh (Crosspoint Labs), Matt Caswell
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2024-01-19 CVE Reserved
  • 2024-01-25 CVE Published
  • 2024-02-03 EPSS Updated
  • 2024-10-14 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-476: NULL Pointer Dereference
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
>= 1.0.2 < 1.0.2zj
Search vendor "Openssl" for product "Openssl" and version " >= 1.0.2 < 1.0.2zj"
-
Affected
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
>= 1.1.1 < 1.1.1x
Search vendor "Openssl" for product "Openssl" and version " >= 1.1.1 < 1.1.1x"
-
Affected
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
>= 3.0.0 < 3.0.13
Search vendor "Openssl" for product "Openssl" and version " >= 3.0.0 < 3.0.13"
-
Affected
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
>= 3.1.0 < 3.1.5
Search vendor "Openssl" for product "Openssl" and version " >= 3.1.0 < 3.1.5"
-
Affected
Openssl
Search vendor "Openssl"
Openssl
Search vendor "Openssl" for product "Openssl"
3.2.0
Search vendor "Openssl" for product "Openssl" and version "3.2.0"
-
Affected