HIGH 7.5

PYSEC-2023-254

Details

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.

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Affected packages

PyPI / cryptography

Introduced in: 0 Fixed in: f09c261ca10a31fe41b1262306db7f8f1da0e48a

Fix pip install --upgrade 'cryptography>=f09c261ca10a31fe41b1262306db7f8f1da0e48a'

References

https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97 [ADVISORY]
https://github.com/pyca/cryptography/pull/9926 [FIX]
https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a [FIX]
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/ [WEB]