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CVE-2024-26130

cryptography NULL pointer deference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override

Published: Feb 21, 2024Updated: Feb 5, 2025 Sources: CVE List NVD GHSA BDUCWE-476
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.8%
Top 47.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-476

Affected Products

cryptographypyca
Library
OSS Libraries / pypi
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
cryptographyСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
cryptographycryptography.io
Library
OSS Libraries / pypi
pycaoss-projectGBOSS Librariesaka pyca/cryptography, py ca, pyca
ооо «ред софт»commercialRUOperating Systemsaka red soft
ао «ивк»commercialRUOperating Systemsaka ivk
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
cryptography.iooss-projectOSS Librariesaka cryptography
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4
github.com
https://github.com/pyca/cryptography/pull/10423
github.com
https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55
github.com
and 9 more references View all →

Timeline

Published
Feb 21, 2024
Last Updated
Feb 5, 2025

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