CVE-2023-49083: cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

CVE-2023-49083 · Severity: low · CVSS 3.1 · Published 2023-11-29

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.

Technologies: cryptography (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2023-49083 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2023-49083 being exploited in the wild.
How severe is CVE-2023-49083?
Low severity, with a CVSS score of 3.1, published 29 November 2023.
Which products and versions are affected?
cryptography (PyPI) ECOSYSTEM:introduced=3.1,fixed=41.0.6, GIT:introduced=0,fixed=f09c261ca10a31fe41b1262306db7f8f1da0e48a|ECOSYSTEM:introduced=3.1,fixed=41.0.6.
Is there a fix for CVE-2023-49083?
Yes. cryptography (PyPI): upgrade to 41.0.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2023-49083?
Check whether you run cryptography (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • cryptography (PyPI): upgrade to 41.0.6 or later
    pip install "cryptography>=41.0.6"

Affected products

  • cryptography (PyPI) ECOSYSTEM:introduced=3.1,fixed=41.0.6, GIT:introduced=0,fixed=f09c261ca10a31fe41b1262306db7f8f1da0e48a|ECOSYSTEM:introduced=3.1,fixed=41.0.6

Identifiers

  • CVE-2023-49083
  • GHSA-jfhm-5ghh-2f97
  • PYSEC-2023-254

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