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WS-2023-0116

Good to know:

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Date: August 19, 2025

RSA1_5 in jose4j is susceptible to chosen ciphertext attacks. The attack allows to decrypt RSA1_5 or RSA_OAEP encrypted ciphertexts. It may be feasible to sign with affected keys.

Language: Java

Severity Score

Related Resources (6)

https://bitbucket.org/b_c/jose4j/commits/63b86581e7bfcc2d9d04ee15caea4b5bfb911f59
https://github.com/google/security-research/security/advisories/GHSA-jgvc-jfgh-rjvv
https://github.com/google/security-research
https://bitbucket.org/b_c/jose4j/commits/14e62a8dee9decb4ff6e0625aedc5724601bfdb6
https://bitbucket.org/b_c/jose4j/commits/tag/jose4j-0.9.3
https://www.mend.io/vulnerability-database/WS-2023-0116

Severity Score

Weakness Type (CWE)

Use of a Broken or Risky Cryptographic Algorithm

CWE-327

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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