WARNING: MAJOR (BREAKING) CHANGE: Update dependency cryptography to v43 [SECURITY] (master)

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cryptography	==41.0.3 -> ==43.0.1

GitHub Vulnerability Alerts

GHSA-v8gr-m533-ghj9

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 2.5-41.0.3 are vulnerable to several security issues. More details about the vulnerabilities themselves can be found in https://www.openssl.org/news/secadv/20230908.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

CVE-2023-49083

Summary

Calling load_pem_pkcs7_certificates or load_der_pkcs7_certificates could 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.

CVE-2023-50782

A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

CVE-2024-0727

Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL
to crash leading to a potential Denial of Service attack

Impact summary: Applications loading files in the PKCS12 format from untrusted
sources might terminate abruptly.

A file in PKCS12 format can contain certificates and keys and may come from an
untrusted source. The PKCS12 specification allows certain fields to be NULL, but
OpenSSL does not correctly check for this case. This can lead to a NULL pointer
dereference that results in OpenSSL crashing. If an application processes PKCS12
files from an untrusted source using the OpenSSL APIs then that application will
be vulnerable to this issue.

OpenSSL APIs that are vulnerable to this are: PKCS12_parse(),
PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes()
and PKCS12_newpass().

We have also fixed a similar issue in SMIME_write_PKCS7(). However since this
function is related to writing data we do not consider it security significant.

The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue.

CVE-2024-26130

If pkcs12.serialize_key_and_certificates is called with both:

1. A certificate whose public key did not match the provided private key
2. An encryption_algorithm with hmac_hash set (via PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)

Then a NULL pointer dereference would occur, crashing the Python process.

This has been resolved, and now a ValueError is properly raised.

Patched in https://github.com/pyca/cryptography/pull/10423

GHSA-h4gh-qq45-vh27

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 37.0.0-43.0.0 are vulnerable to a security issue. More details about the vulnerability itself can be found in https://openssl-library.org/news/secadv/20240903.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

---

Vulnerable OpenSSL included in cryptography wheels

GHSA-v8gr-m533-ghj9

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 2.5-41.0.3 are vulnerable to several security issues. More details about the vulnerabilities themselves can be found in https://www.openssl.org/news/secadv/20230908.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

Low

References

• https://github.com/pyca/cryptography/security/advisories/GHSA-v8gr-m533-ghj9
• https://github.com/pyca/cryptography/commit/fc11bce6930e591ce26a2317b31b9ce2b3e25512
• https://github.com/pyca/cryptography

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

CVE-2023-49083 / GHSA-jfhm-5ghh-2f97 / PYSEC-2023-254

More information

Details

Summary

Calling load_pem_pkcs7_certificates or load_der_pkcs7_certificates could 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.

Severity

• CVSS Score: 5.9 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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.fedoraproject.org/archives/list/[email protected]/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV
• http://www.openwall.com/lists/oss-security/2023/11/29/2

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

CVE-2023-49083 / GHSA-jfhm-5ghh-2f97 / PYSEC-2023-254

More information

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.

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

• 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
• https://lists.fedoraproject.org/archives/list/[email protected]/message/QMNTYMUGFJSDBYBU22FUYBHFRZODRKXV/

This data is provided by OSV and the PyPI Advisory Database (CC-BY 4.0).

---

Python Cryptography package vulnerable to Bleichenbacher timing oracle attack

CGA-45f3-3fmq-7h5w / CVE-2023-50782 / GHSA-3ww4-gg4f-jr7f

More information

Details

A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-50782
• https://github.com/pyca/cryptography/issues/9785
• https://access.redhat.com/security/cve/CVE-2023-50782
• https://bugzilla.redhat.com/show_bug.cgi?id=2254432
• https://github.com/pyca/cryptography

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

Null pointer dereference in PKCS12 parsing

CGA-v739-9xhw-5vmf / CVE-2024-0727 / GHSA-9v9h-cgj8-h64p

More information

Details

Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL
to crash leading to a potential Denial of Service attack

Impact summary: Applications loading files in the PKCS12 format from untrusted
sources might terminate abruptly.

A file in PKCS12 format can contain certificates and keys and may come from an
untrusted source. The PKCS12 specification allows certain fields to be NULL, but
OpenSSL does not correctly check for this case. This can lead to a NULL pointer
dereference that results in OpenSSL crashing. If an application processes PKCS12
files from an untrusted source using the OpenSSL APIs then that application will
be vulnerable to this issue.

OpenSSL APIs that are vulnerable to this are: PKCS12_parse(),
PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes()
and PKCS12_newpass().

We have also fixed a similar issue in SMIME_write_PKCS7(). However since this
function is related to writing data we do not consider it security significant.

The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue.

Severity

• CVSS Score: 5.5 / 10 (Medium)
• Vector String: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-0727
• https://github.com/github/advisory-database/pull/3472
• https://github.com/openssl/openssl/pull/23362
• https://github.com/alexcrichton/openssl-src-rs/commit/add20f73b6b42be7451af2e1044d4e0e778992b2
• https://github.com/openssl/openssl/commit/09df4395b5071217b76dc7d3d2e630eb8c5a79c2
• https://github.com/openssl/openssl/commit/775acfdbd0c6af9ac855f34969cdab0c0c90844a
• https://github.com/openssl/openssl/commit/d135eeab8a5dbf72b3da5240bab9ddb7678dbd2c
• https://github.com/pyca/cryptography/commit/3519591d255d4506fbcd0d04037d45271903c64d
• https://github.openssl.org/openssl/extended-releases/commit/03b3941d60c4bce58fab69a0c22377ab439bc0e8
• https://github.openssl.org/openssl/extended-releases/commit/aebaa5883e31122b404e450732dc833dc9dee539
• https://security.netapp.com/advisory/ntap-20240208-0006
• https://www.openssl.org/news/secadv/20240125.txt
• http://www.openwall.com/lists/oss-security/2024/03/11/1

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

CGA-f4qg-9fw4-8247 / CVE-2024-26130 / GHSA-6vqw-3v5j-54x4 / PYSEC-2024-225

More information

Details

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to version 42.0.4, if pkcs12.serialize_key_and_certificates is called with both a certificate whose public key did not match the provided private key and an encryption_algorithm with hmac_hash set (via PrivateFormat.PKCS12.encryption_builder().hmac_hash(...), then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a ValueError is properly raised.

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

• https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4
• https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55
• https://github.com/pyca/cryptography/pull/10423

This data is provided by OSV and the PyPI Advisory Database (CC-BY 4.0).

---

cryptography NULL pointer dereference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override

CGA-f4qg-9fw4-8247 / CVE-2024-26130 / GHSA-6vqw-3v5j-54x4 / PYSEC-2024-225

More information

Details

If pkcs12.serialize_key_and_certificates is called with both:

1. A certificate whose public key did not match the provided private key
2. An encryption_algorithm with hmac_hash set (via PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)

Then a NULL pointer dereference would occur, crashing the Python process.

This has been resolved, and now a ValueError is properly raised.

Patched in https://github.com/pyca/cryptography/pull/10423

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

• https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4
• https://nvd.nist.gov/vuln/detail/CVE-2024-26130
• https://github.com/pyca/cryptography/pull/10423
• https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55
• https://github.com/pyca/cryptography
• https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2024-225.yaml

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

pyca/cryptography has a vulnerable OpenSSL included in cryptography wheels

GHSA-h4gh-qq45-vh27

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 37.0.0-43.0.0 are vulnerable to a security issue. More details about the vulnerability itself can be found in https://openssl-library.org/news/secadv/20240903.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

Moderate

References

• https://github.com/pyca/cryptography/security/advisories/GHSA-h4gh-qq45-vh27
• https://github.com/pyca/cryptography
• https://openssl-library.org/news/secadv/20240903.txt

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

---

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