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8 vulnerabilities found for cryptography by cryptography_project
CVE-2023-49083 (GCVE-0-2023-49083)
Vulnerability from nvd – Published: 2023-11-29 18:50 – Updated: 2025-12-18 15:32
VLAI
EPSS
VEX
Title
cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
Summary
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.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/pyca/cryptography/security/adv… | x_refsource_CONFIRM |
| https://github.com/pyca/cryptography/pull/9926 | x_refsource_MISC |
| https://github.com/pyca/cryptography/commit/f09c2… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pyca | cryptography |
Affected:
>= 3.1, < 41.0.6
|
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CVE-2023-38325 (GCVE-0-2023-38325)
Vulnerability from nvd – Published: 2023-07-14 00:00 – Updated: 2024-10-30 16:00
VLAI
EPSS
VEX
Summary
The cryptography package before 41.0.2 for Python mishandles SSH certificates that have critical options.
Severity
No CVSS data available.
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
Assigner
References
6 references
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CVE-2023-23931 (GCVE-0-2023-23931)
Vulnerability from nvd – Published: 2023-02-07 20:54 – Updated: 2025-11-03 21:47
VLAI
EPSS
VEX
Title
Cipher.update_into can corrupt memory in pyca cryptography
Summary
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pyca | cryptography |
Affected:
>=1.8, < 39.0.1
|
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CVE-2020-36242 (GCVE-0-2020-36242)
Vulnerability from nvd – Published: 2021-02-07 19:50 – Updated: 2024-08-04 17:23
VLAI
EPSS
VEX
Summary
In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/pyca/cryptography/issues/5615 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://github.com/pyca/cryptography/compare/3.3.… | x_refsource_CONFIRM |
| https://github.com/pyca/cryptography/blob/master/… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2023-49083 (GCVE-0-2023-49083)
Vulnerability from cvelistv5 – Published: 2023-11-29 18:50 – Updated: 2025-12-18 15:32
VLAI
EPSS
VEX
Title
cryptography vulnerable to NULL-dereference when loading PKCS7 certificates
Summary
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.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/pyca/cryptography/security/adv… | x_refsource_CONFIRM |
| https://github.com/pyca/cryptography/pull/9926 | x_refsource_MISC |
| https://github.com/pyca/cryptography/commit/f09c2… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pyca | cryptography |
Affected:
>= 3.1, < 41.0.6
|
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CVE-2023-38325 (GCVE-0-2023-38325)
Vulnerability from cvelistv5 – Published: 2023-07-14 00:00 – Updated: 2024-10-30 16:00
VLAI
EPSS
VEX
Summary
The cryptography package before 41.0.2 for Python mishandles SSH certificates that have critical options.
Severity
No CVSS data available.
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
Assigner
References
6 references
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CVE-2023-23931 (GCVE-0-2023-23931)
Vulnerability from cvelistv5 – Published: 2023-02-07 20:54 – Updated: 2025-11-03 21:47
VLAI
EPSS
VEX
Title
Cipher.update_into can corrupt memory in pyca cryptography
Summary
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pyca | cryptography |
Affected:
>=1.8, < 39.0.1
|
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CVE-2020-36242 (GCVE-0-2020-36242)
Vulnerability from cvelistv5 – Published: 2021-02-07 19:50 – Updated: 2024-08-04 17:23
VLAI
EPSS
VEX
Summary
In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/pyca/cryptography/issues/5615 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://github.com/pyca/cryptography/compare/3.3.… | x_refsource_CONFIRM |
| https://github.com/pyca/cryptography/blob/master/… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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