CVE-2023-49083

Advisory

Affected versions of Cryptography are vulnerable to NULL-dereference when loading PKCS7 certificates. 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.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

This vulnerability has no description

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-49083
• https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97
• https://github.com/pyca/cryptography/pull/9926
• https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a