CVE-2023-49083

Public Exploit
cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Calling `load_pem_pkcs7_certificates` or `load_der_pkcs7_certificates` could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability. This vulnerability has been patched in version 41.0.6.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.46%
Vendor Advisory github.com
Affected: pyca cryptography
Published at:
Updated at:

References

Link Tags
https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97 vendor advisory exploit
https://github.com/pyca/cryptography/pull/9926 patch issue tracking
https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/

Frequently Asked Questions

What is the severity of CVE-2023-49083?
CVE-2023-49083 has been scored as a medium severity vulnerability.
How to fix CVE-2023-49083?
To fix CVE-2023-49083, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-49083 being actively exploited in the wild?
It is possible that CVE-2023-49083 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-49083?
CVE-2023-49083 affects pyca cryptography.
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