CVE-2023-49083
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.98%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.98% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- cryptography.io/cryptography
- Source
- security-advisories@github.com
References
- https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48aPatch
- https://github.com/pyca/cryptography/pull/9926Issue Tracking, Patch
- https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97Exploit, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/
- https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48aPatch
- https://github.com/pyca/cryptography/pull/9926Issue Tracking, Patch
- https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97Exploit, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.