GHSA-jgvc-jfgh-rjvv: Jose4j Chosen Ciphertext Attack Vulnerability

MODERATE
Share
CWE-327
Published
Advisory Summary

GHSA-jgvc-jfgh-rjvv is a MODERATE chosen ciphertext attack vulnerability (CWE-327: Use of a Broken or Risky Cryptographic Algorithm) affecting Jose4j libraries in the Maven ecosystem. The issue involves chosen ciphertext attack in jose4j. Remediation is available by upgrading affected packages to version 0.9.3.

GHSA-jgvc-jfgh-rjvv at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-jgvc-jfgh-rjvv
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-327: Use of a Broken or Risky Cryptographic Algorithm
Affected Product Jose4j
Package Ecosystem Maven
Published Date
Last Updated

How to Fix GHSA-jgvc-jfgh-rjvv

To remediate this vulnerability, upgrade all affected Jose4j dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.bitbucket.b_c:jose4j fixed: 0.9.3 
<dependency>
    <groupId>org.bitbucket.b_c</groupId>
    <artifactId>jose4j</artifactId>
    <version>0.9.3</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.bitbucket.b_c

How to Check if You Are Affected

To determine whether your Java application is affected by GHSA-jgvc-jfgh-rjvv, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.bitbucket.b_c

Analyze the terminal output to locate any version of Jose4j in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.9.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.bitbucket.b_c command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-327: Use of a Broken or Risky Cryptographic Algorithm, where the product uses a broken or risky cryptographic algorithm or protocol. In Jose4j, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary 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. ### Severity Moderate - exploiting this ciphertext attack could result in the ability to decrypt RSA1_5 or RSA_OAEP encrypted ciphertexts. ### Proof of Concept A test case that can reproduce the padding oracle uses the following private key: ``` { "kty": "RSA", "alg": "RSA1_5", "use": "enc", "n": "w2A4cbwOAK4ATnwXkGWereqv9dkEcgAGHc9g-cjo1HFeilYirvfD2Un2vQxW_6g2OKRPmmo46vMZFMYv_V57174j411y-NQlZGb7iFqMQADzo60VZ7vpvAX_NuxNGxYR-N2cBgvgqDiGAoO9ouNdhuHhxipTjGVfrPUpxmJtNPZpxsgxQWSpYCYMl304DD_5wWrnumNNIKOaVsAYmjFPV_wqxFCHbitPd1BG9SwXPk7wAHtXT6rYaUImS_OKaHkTO1OO0PNhd3-wJRNMCh_EGUwAghfWgFyAd20pQLZamamxgHvfL4-0hwuzndhHt0ye-gRVTtXDFEwABB--zwvlCw", "e": "AQAB", "kid": "rsa1_5", "d": "EjMvbuDeyQ9sdeM3arscqgTXuWYq9Netui8sUHh3v_qDnQ1jE7t-4gny0y-IFy67RlGAHNlSTgixSG8h309i5_kNbMuyvx08EntJaS1OLVQpXhDskoo9vscsPBiNIj3PFMjIFQQcPG9vhGJzUu4tMzhtiME-oTB8VidMae-XTryPvozTu4rgfb4U7uauvLqESLz3A5xtzPnwNwqXAIlrdxU-MT_iln08on_QIF8afWUqCbsWWjEck_QDKLVpzh8VV9kkEVWwYfCFhHBwS-fgGJJTE3gK4HwOokydMtH95Dzj47MA2pLe600l7ioyGSPltcv967NtOpxMPM5ro751KQ", "p": "-F1u3NAMWPu1TIuvIywIjh5fuiA3AVKLgS6Fw_hAi3M9c3T7E1zNJZuHgQExJEu06ZPfzye9m7taDzh-Vw4VGDED_MZedsE2jEsWa9EKeq3bZVf5j81FLCHH8BicFqrPjvoVUC35wrl9SGJzaOa7KXxD2jW22umYjJS_kcopvf0", "q": "yWHG7jHqvfqT8gfhIlxpMbeJ02FrWIkgJC-zOJ26wXC6oxPeqhqEO7ulGqZPngNDdSGgWcQ7noGEU8O4MA9V3yhl91TFZy8unox0sGe0jDMwtxm3saXtTsjTE7FBxzcR0PubfyGiS0fJqQcj8oJSWzZPkUshzZ8rF3jTLc8UWac", "dp": "Va9WWhPkzqY4TCo8x_OfF_jeqcYHdAtYWb8FIzD4g6PEZZrMLEft9rWLsDQLEiyUQ6lio4NgZOPkFDA3Vi1jla8DYyfE20-ZVBlrqNK7vMtST8pkLPpyjOEyq2CyKRfQ99DLnZfe_RElad2dV2mS1KMsfZHeffPtT0LaPJ_0erk", "dq": "M8rA1cviun9yg0HBhgvMRiwU91dLu1Zw_L2D02DFgjCS35QhpQ_yyEYHPWZefZ4LQFmoms2cI7TdqolgmoOnKyCBsO2NY29AByjKbgAN8CzOL5kepEKvWJ7PonXpG-ou29eJ81VcHw5Ub_NVLG6V7b13E0AGbpKsC3pYnaRvcGs", "qi": "8zIqISvddJYC93hP0sKkdHuVd-Mes_gsbi8xqSFYGqc-wSU12KjzHnZmBuJl_VTGy9CO9W4K2gejr588a3Ozf9U5hx9qCVkV0_ttxHcTRem5sFPe9z-HkQE5IMW3SdmL1sEcvkzD7z8QhcHRpp5aMptfuwnxBPY8U449_iNgXd4" }, ``` jose4j has distinguishable behvaior for the following test cases: The first ciphertext below contains an invalid PKCS #1 padding. Because of hte invalid padding a random AES key is generated during decryption. This leads to an authentication error. ``` "eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4R0NNIn0.ksmeZ6dBbP0UfDEaLXlqPl2XDaAA29kGlKtDb89x-4xN5-A6bx2umI_ToHK2GadzxUOgKROCACYb6rmKsqsQCOZaBsnq_4mDII1W0pja7Lz4zTnr7R3O4kALg4zXqG-gSlcDA7k1NgkpMDS15PjMmADqyqxbxQsXdfjstN324iqdvYGh6NsckkfTSWxDVAqiSR9fW8PsIbo3uSMokNaC-f64CDWIB9AsCxhF-3mnFbxXNxw7JE0upOgG4enQ8kZkwi_v54HBqAau1YNW7gPhFV8ElTQ71J6aHB3dja23lbWdaJmrK6PJE7gEeZmUbFkSYmuyzRUS-NGfXA23fYv5JQ.46AsIpPgnJCLH0Xm.u2rG.LyEHEGCWM8CXDEEHiaqhiQ" ``` The second ciphertext below ontains valid PKCS #1 padding, but the size of the encoded key is incorrect. Because of this, trying to dcrypt the symmetric part of the ciphertext immediately fails with org.jose4j.lang.JoseException: Invalid key for AES/GCM/NoPadding. ``` "eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4R0NNIn0.oyVTmkyoChxFtyCtiKhv8OpBJcV6C6s_gMFSSRJBNStpdHPzq2YmroTfXGj1J1plFG4BBQwIZtdt6rIS6YkCvTLGqP1hds9CAO1a_bgRyoAVuOVvH2vmz5U2r74_SRbAzD35M7yZ_tSnnEdMFlHMFbf5uNwmgArrtPgh0V5OLn5i4XIc154FLTiQlvAEhUxiPuYBkm_1GBiYEH4JjP2RKXAUx_TxAVwPsOfIPAVrO0Ev_nvdtVLCE-uOn8WQbxh4wwOztaXOV1HIaPrl7HN-YtDOA840QUHm97ZZLAPRgLzGlkMI0ZS8QkYdb9_FT3KMbNu60nBKEniv2uhBdIhM9g.46AsIpPgnJCLH0Xm.u2rG.LyEHEGCWM8CXDEEHiaqhiQ" ``` A correct implementation would not have distinguishable behavior. A test case for the missing algorithm checks uses the key: ``` { "alg": "RSA-OAEP", "use": "enc", "n": "kqGboBfAWttWPCA-0cGRgsY6SaYoIARt0B_PkaEcIq9HPYNdu9n6UuWHuuTHrjF_ZoQW97r5HaAorNvrMEGTGdxCHZdEtkHvNVVmrtxTBLiQCbCozXhFoIrVcr3qUBrdGnNn_M3jJi7Wg7p_-x62nS5gNG875oyheRkutHsQXikFZwsN3q_TsPNOVlCiHy8mxzaFTUQGm-X8UYexFyAivlDSjgDJLAZSWfxd7k9Gxuwa3AUfQqQcVcegmgKGCaErQ3qQbh1x7WB6iopE3_-GZ8HMAVtR9AmrVscqYsnjhaCehfAI0iKKs8zXr8tISc0ORbaalrkk03H1ZrsEnDKEWQ", "e": "AQAB", "d": "YsfIRYN6rDqSz5KRf1E9q7HK1o6-_UK-j7S-asb0Y1FdVs1GuiRQhMPoOjmhY3Io93EI3_7vj8uzWzAUMsAaTxOY3sJnIbktYuqTcD0xGD8VmdGPBkx963db8B6M2UYfqZARf7dbzP9EuB1N1miMcTsqyGgfHGOk7CXQ1vkIv8Uww38KMtEdJ3iB8r-f3qcu-UJjE7Egw9CxKOMjArOXxZEr4VnoIXrImrcTxBfjdY8GbzXGATiPQLur5GT99ZDW78falsir-b5Ean6HNyOeuaJuceT-yjgCXn57Rd3oIHD94CrjNtjBusoLdjbr489L8K9ksCh1gynzLGkeeWgVGQ", "p": "0xalbl1PJbSBGD4XOjIYJLwMYyHMiM06SBauMGzBfCask5DN5jH68Kw1yPS4wkLpx4ltGLuy0X5mMaZzrSOkBGb27-NizBgB2-L279XotznWeh2jbF05Kqzkoz3VaX_7dRhCHEhOopMQh619hA1bwaJyW1k8aNlLPTl3BotkP4M", "q": "sdQsQVz3tI7hmisAgiIjppOssEnZaZO0ONeRRDxBHGLe3BCo1FJoMMQryOAlglayjQnnWjQ-BpwUpa0r9YQhVLweoNEIig6Beph7iYRZgOHEiiTTgUIGgXAL6xhsby1PueUfT0xsN1Y7qt5f5EwOfu7tnFqNyJXIp9W1NQgU6fM", "dp": "kEpEnuJNfdqa-_VFb1RayJF6bjDmXQTcN_a47wUIZVMSWHR9KkMz41v0D_-oY7HVl73Kw0NagnVCaeH75HgeX5v6ZBQsrpIigynr3hl8T_LLNwIXebVnpFI2n5de0BTZ0DraxfZvOhYJEJV43NE8zWm7fdHLx2fxVFJ5mBGkXv0", "dq": "U_xJCnXF51iz5AP7MXq-K6YDIR8_t0UzEMV-riNm_OkVKAoWMnDZFG8R3sU98djQaxwKT-fsg2KjvbuTz1igBUzzijAvQESpkiUB82i2fNAj6rqJybpNKESq3FWkoL1dsgYsS19knJ31gDWWRFRHZFujjPyXiexz4BBmjK1Mc1E", "qi": "Uvb84tWiJF3fB-U9wZSPi7juGgrzeXS_LYtf5fcdV0fZg_h_5nSVpXyYyQ-PK218qEC5MlDkaHKRD9wBOe_eU_zJTNoXzB2oAcgl2MapBWUMytbiF84ghP_2K9UD63ZVsyrorSZhmsJIBBuqQjrmk0tIdpMdlMxLYhrbYwFxUqc", "kid": "kid-rsa-enc-oaep", "kty": "RSA" } ``` and the cipher text ``` "eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4R0NNIn0.CuUuY9PH2wWjuLXd5O9LLFanwyt5-y-NzEpy9rC3A63tFsvdp8GWP1kRt1d3zd0bGqakwls623VQxzxqQ25j5gdHh8dKMl67xTLHt1Qlg36nI9Ukn7syq25VrzfrRRwy0k7isqMncHpzuBQlmfzPrszW7d13z7_ex0Uha869RaP-W2NNBfHYw26xIXcCSVIPg8jTLA7h6QmOetEej-NXXcWrRKQgBRapYy4iWrij9Vr3JzAGSHVtIID74tFOm01FdJj4s1M4IXegDbvAdQb6Vao1Ln5GolnTki4IGvH5FDssDHz6MS2JG5QBcITzfuXU81vDC00xzNEuMat0AngmOw.UjPQbnakkZYUdoDa.vcbS.WQ_bOPiGKjPSq-qyGOIfjA" ``` The header of this ciphertext is: ``` {"alg":"RSA1_5","enc":"A128GCM"}``` Hence the algorithm in the header does not match the algorithm in the key. Such ciphertexts should be rejected. The wrapped key is a valid RSA1_5 encrypted key. jose4j currently decrypts the ciphertext above without an exception. The problem with this behavior is that jose4j also allows chosen ciphertext attacks when the key uses RSA_OAEP. The attacker simply has to modify the header to and replace the algorithm with RSA1_5. Attempts to decrypt modified ciphertexts will then leak whether the decrypted message has valid PKCS #1 padding. ### Further Analysis Fix Commit - https://bitbucket.org/b_c/jose4j/commits/63b86581e7bfcc2d9d04ee15caea4b5bfb911f59 ### Timeline **Date reported**: 01/27/2023 **Date fixed**: 02/09/2023 **Date disclosed**: 04/27/2023

GHSA-jgvc-jfgh-rjvv Affected Jose4j Versions

1 component(s)
Fixed Versions:
0.9.3
Product / Package Ecosystem Affected Versions Fixed Version
org.bitbucket.b_c:jose4j
maven/org.bitbucket.b_c/jose4j
Maven
< 0.9.3
0.9.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/google/security-research/security/advisories/GHSA-jgvc-jfgh-rjvv
bitbucket.org/b_c/jose4j/commits/... WEB
https://bitbucket.org/b_c/jose4j/commits/14e62a8dee9decb4ff6e0625aedc5724601bfdb6
bitbucket.org/b_c/jose4j/commits/... WEB
https://bitbucket.org/b_c/jose4j/commits/63b86581e7bfcc2d9d04ee15caea4b5bfb911f59
bitbucket.org/b_c/jose4j/commits/... WEB
https://bitbucket.org/b_c/jose4j/commits/tag/jose4j-0.9.3
Jose4j Source Repository REPOSITORY
https://github.com/google/security-research

Frequently Asked Questions

What is GHSA-jgvc-jfgh-rjvv?
GHSA-jgvc-jfgh-rjvv is a security vulnerability in Jose4j involving Chosen Ciphertext Attack in Jose4j under CWE-327: Use of a Broken or Risky Cryptographic Algorithm.
Which Jose4j versions are affected?
Affected versions include releases prior to 0.9.3 across affected packages: org.bitbucket.b_c:jose4j.
What version fixes GHSA-jgvc-jfgh-rjvv?
Upgrading to 0.9.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jose4j affected?
Yes, org.bitbucket.b_c:jose4j is affected in releases prior to 0.9.3. Upgrade your dependency to 0.9.3 or later.
What CWE is associated with GHSA-jgvc-jfgh-rjvv?
GHSA-jgvc-jfgh-rjvv is classified under CWE-327: Use of a Broken or Risky Cryptographic Algorithm (The product uses a broken or risky cryptographic algorithm or protocol.).
How can I check Maven dependencies for GHSA-jgvc-jfgh-rjvv?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.bitbucket.b_c'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jgvc-jfgh-rjvv",
  "modified" : "2023-04-27T23:52:54Z",
  "published" : "2023-04-27T23:52:54Z",
  "aliases" : [ ],
  "summary" : "Chosen Ciphertext Attack in Jose4j",
  "details" : "### Summary\nRSA1_5 in jose4j is susceptible to chosen ciphertext attacks. The\nattack allows to decrypt RSA1_5 or RSA_OAEP encrypted ciphertexts. It may\nbe feasible to sign with affected keys.\n\n### Severity\nModerate - exploiting this ciphertext attack could result in the ability to decrypt RSA1_5 or RSA_OAEP encrypted ciphertexts.\n\n### Proof of Concept\nA test case that can reproduce the padding oracle uses the following private key:\n\n```\n{\n        \"kty\": \"RSA\",\n        \"alg\": \"RSA1_5\",\n        \"use\": \"enc\",\n        \"n\": \"w2A4cbwOAK4ATnwXkGWereqv9dkEcgAGHc9g-cjo1HFeilYirvfD2Un2vQxW_6g2OKRPmmo46vMZFMYv_V57174j411y-NQlZGb7iFqMQADzo60VZ7vpvAX_NuxNGxYR-N2cBgvgqDiGAoO9ouNdhuHhxipTjGVfrPUpxmJtNPZpxsgxQWSpYCYMl304DD_5wWrnumNNIKOaVsAYmjFPV_wqxFCHbitPd1BG9SwXPk7wAHtXT6rYaUImS_OKaHkTO1OO0PNhd3-wJRNMCh_EGUwAghfWgFyAd20pQLZamamxgHvfL4-0hwuzndhHt0ye-gRVTtXDFEwABB--zwvlCw\",\n        \"e\": \"AQAB\",\n        \"kid\": \"rsa1_5\",\n        \"d\": \"EjMvbuDeyQ9sdeM3arscqgTXuWYq9Netui8sUHh3v_qDnQ1jE7t-4gny0y-IFy67RlGAHNlSTgixSG8h309i5_kNbMuyvx08EntJaS1OLVQpXhDskoo9vscsPBiNIj3PFMjIFQQcPG9vhGJzUu4tMzhtiME-oTB8VidMae-XTryPvozTu4rgfb4U7uauvLqESLz3A5xtzPnwNwqXAIlrdxU-MT_iln08on_QIF8afWUqCbsWWjEck_QDKLVpzh8VV9kkEVWwYfCFhHBwS-fgGJJTE3gK4HwOokydMtH95Dzj47MA2pLe600l7ioyGSPltcv967NtOpxMPM5ro751KQ\",\n        \"p\": \"-F1u3NAMWPu1TIuvIywIjh5fuiA3AVKLgS6Fw_hAi3M9c3T7E1zNJZuHgQExJEu06ZPfzye9m7taDzh-Vw4VGDED_MZedsE2jEsWa9EKeq3bZVf5j81FLCHH8BicFqrPjvoVUC35wrl9SGJzaOa7KXxD2jW22umYjJS_kcopvf0\",\n        \"q\": \"yWHG7jHqvfqT8gfhIlxpMbeJ02FrWIkgJC-zOJ26wXC6oxPeqhqEO7ulGqZPngNDdSGgWcQ7noGEU8O4MA9V3yhl91TFZy8unox0sGe0jDMwtxm3saXtTsjTE7FBxzcR0PubfyGiS0fJqQcj8oJSWzZPkUshzZ8rF3jTLc8UWac\",\n        \"dp\": \"Va9WWhPkzqY4TCo8x_OfF_jeqcYHdAtYWb8FIzD4g6PEZZrMLEft9rWLsDQLEiyUQ6lio4NgZOPkFDA3Vi1jla8DYyfE20-ZVBlrqNK7vMtST8pkLPpyjOEyq2CyKRfQ99DLnZfe_RElad2dV2mS1KMsfZHeffPtT0LaPJ_0erk\",\n        \"dq\": \"M8rA1cviun9yg0HBhgvMRiwU91dLu1Zw_L2D02DFgjCS35QhpQ_yyEYHPWZefZ4LQFmoms2cI7TdqolgmoOnKyCBsO2NY29AByjKbgAN8CzOL5kepEKvWJ7PonXpG-ou29eJ81VcHw5Ub_NVLG6V7b13E0AGbpKsC3pYnaRvcGs\",\n        \"qi\": \"8zIqISvddJYC93hP0sKkdHuVd-Mes_gsbi8xqSFYGqc-wSU12KjzHnZmBuJl_VTGy9CO9W4K2gejr588a3Ozf9U5hx9qCVkV0_ttxHcTRem5sFPe9z-HkQE5IMW3SdmL1sEcvkzD7z8QhcHRpp5aMptfuwnxBPY8U449_iNgXd4\"\n      },\n```\njose4j has distinguishable behvaior for the following test cases:\n\nThe first ciphertext below contains an invalid PKCS #1 padding.  Because of hte invalid padding a random AES key is generated during decryption.  This leads to an authentication error.\n\n```\n\"eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4R0NNIn0.ksmeZ6dBbP0UfDEaLXlqPl2XDaAA29kGlKtDb89x-4xN5-A6bx2umI_ToHK2GadzxUOgKROCACYb6rmKsqsQCOZaBsnq_4mDII1W0pja7Lz4zTnr7R3O4kALg4zXqG-gSlcDA7k1NgkpMDS15PjMmADqyqxbxQsXdfjstN324iqdvYGh6NsckkfTSWxDVAqiSR9fW8PsIbo3uSMokNaC-f64CDWIB9AsCxhF-3mnFbxXNxw7JE0upOgG4enQ8kZkwi_v54HBqAau1YNW7gPhFV8ElTQ71J6aHB3dja23lbWdaJmrK6PJE7gEeZmUbFkSYmuyzRUS-NGfXA23fYv5JQ.46AsIpPgnJCLH0Xm.u2rG.LyEHEGCWM8CXDEEHiaqhiQ\"\n```\n\nThe second ciphertext below ontains valid PKCS #1 padding, but the size of the encoded key is incorrect.  Because of this, trying to dcrypt the symmetric part of the ciphertext immediately fails with org.jose4j.lang.JoseException: Invalid key for AES/GCM/NoPadding.\n\n```\n\"eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4R0NNIn0.oyVTmkyoChxFtyCtiKhv8OpBJcV6C6s_gMFSSRJBNStpdHPzq2YmroTfXGj1J1plFG4BBQwIZtdt6rIS6YkCvTLGqP1hds9CAO1a_bgRyoAVuOVvH2vmz5U2r74_SRbAzD35M7yZ_tSnnEdMFlHMFbf5uNwmgArrtPgh0V5OLn5i4XIc154FLTiQlvAEhUxiPuYBkm_1GBiYEH4JjP2RKXAUx_TxAVwPsOfIPAVrO0Ev_nvdtVLCE-uOn8WQbxh4wwOztaXOV1HIaPrl7HN-YtDOA840QUHm97ZZLAPRgLzGlkMI0ZS8QkYdb9_FT3KMbNu60nBKEniv2uhBdIhM9g.46AsIpPgnJCLH0Xm.u2rG.LyEHEGCWM8CXDEEHiaqhiQ\"\n```\n\nA correct implementation would not have distinguishable behavior.  A test case for the missing algorithm checks uses the key:\n\n```\n{\n        \"alg\": \"RSA-OAEP\",\n        \"use\": \"enc\",\n        \"n\": \"kqGboBfAWttWPCA-0cGRgsY6SaYoIARt0B_PkaEcIq9HPYNdu9n6UuWHuuTHrjF_ZoQW97r5HaAorNvrMEGTGdxCHZdEtkHvNVVmrtxTBLiQCbCozXhFoIrVcr3qUBrdGnNn_M3jJi7Wg7p_-x62nS5gNG875oyheRkutHsQXikFZwsN3q_TsPNOVlCiHy8mxzaFTUQGm-X8UYexFyAivlDSjgDJLAZSWfxd7k9Gxuwa3AUfQqQcVcegmgKGCaErQ3qQbh1x7WB6iopE3_-GZ8HMAVtR9AmrVscqYsnjhaCehfAI0iKKs8zXr8tISc0ORbaalrkk03H1ZrsEnDKEWQ\",\n        \"e\": \"AQAB\",\n        \"d\": \"YsfIRYN6rDqSz5KRf1E9q7HK1o6-_UK-j7S-asb0Y1FdVs1GuiRQhMPoOjmhY3Io93EI3_7vj8uzWzAUMsAaTxOY3sJnIbktYuqTcD0xGD8VmdGPBkx963db8B6M2UYfqZARf7dbzP9EuB1N1miMcTsqyGgfHGOk7CXQ1vkIv8Uww38KMtEdJ3iB8r-f3qcu-UJjE7Egw9CxKOMjArOXxZEr4VnoIXrImrcTxBfjdY8GbzXGATiPQLur5GT99ZDW78falsir-b5Ean6HNyOeuaJuceT-yjgCXn57Rd3oIHD94CrjNtjBusoLdjbr489L8K9ksCh1gynzLGkeeWgVGQ\",\n        \"p\": \"0xalbl1PJbSBGD4XOjIYJLwMYyHMiM06SBauMGzBfCask5DN5jH68Kw1yPS4wkLpx4ltGLuy0X5mMaZzrSOkBGb27-NizBgB2-L279XotznWeh2jbF05Kqzkoz3VaX_7dRhCHEhOopMQh619hA1bwaJyW1k8aNlLPTl3BotkP4M\",\n        \"q\": \"sdQsQVz3tI7hmisAgiIjppOssEnZaZO0ONeRRDxBHGLe3BCo1FJoMMQryOAlglayjQnnWjQ-BpwUpa0r9YQhVLweoNEIig6Beph7iYRZgOHEiiTTgUIGgXAL6xhsby1PueUfT0xsN1Y7qt5f5EwOfu7tnFqNyJXIp9W1NQgU6fM\",\n        \"dp\": \"kEpEnuJNfdqa-_VFb1RayJF6bjDmXQTcN_a47wUIZVMSWHR9KkMz41v0D_-oY7HVl73Kw0NagnVCaeH75HgeX5v6ZBQsrpIigynr3hl8T_LLNwIXebVnpFI2n5de0BTZ0DraxfZvOhYJEJV43NE8zWm7fdHLx2fxVFJ5mBGkXv0\",\n        \"dq\": \"U_xJCnXF51iz5AP7MXq-K6YDIR8_t0UzEMV-riNm_OkVKAoWMnDZFG8R3sU98djQaxwKT-fsg2KjvbuTz1igBUzzijAvQESpkiUB82i2fNAj6rqJybpNKESq3FWkoL1dsgYsS19knJ31gDWWRFRHZFujjPyXiexz4BBmjK1Mc1E\",\n        \"qi\": \"Uvb84tWiJF3fB-U9wZSPi7juGgrzeXS_LYtf5fcdV0fZg_h_5nSVpXyYyQ-PK218qEC5MlDkaHKRD9wBOe_eU_zJTNoXzB2oAcgl2MapBWUMytbiF84ghP_2K9UD63ZVsyrorSZhmsJIBBuqQjrmk0tIdpMdlMxLYhrbYwFxUqc\",\n        \"kid\": \"kid-rsa-enc-oaep\",\n        \"kty\": \"RSA\"\n      }\n```\n\nand the cipher text\n\n```\n\"eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4R0NNIn0.CuUuY9PH2wWjuLXd5O9LLFanwyt5-y-NzEpy9rC3A63tFsvdp8GWP1kRt1d3zd0bGqakwls623VQxzxqQ25j5gdHh8dKMl67xTLHt1Qlg36nI9Ukn7syq25VrzfrRRwy0k7isqMncHpzuBQlmfzPrszW7d13z7_ex0Uha869RaP-W2NNBfHYw26xIXcCSVIPg8jTLA7h6QmOetEej-NXXcWrRKQgBRapYy4iWrij9Vr3JzAGSHVtIID74tFOm01FdJj4s1M4IXegDbvAdQb6Vao1Ln5GolnTki4IGvH5FDssDHz6MS2JG5QBcITzfuXU81vDC00xzNEuMat0AngmOw.UjPQbnakkZYUdoDa.vcbS.WQ_bOPiGKjPSq-qyGOIfjA\"\n```\nThe header of this ciphertext is:\n  ``` {\"alg\":\"RSA1_5\",\"enc\":\"A128GCM\"}```\nHence the algorithm in the header does not match the algorithm in the key. Such ciphertexts should be rejected. The wrapped key is a valid RSA1_5 encrypted key. jose4j currently decrypts the ciphertext above without an exception. The problem with this behavior is that jose4j also allows chosen ciphertext attacks when the key uses RSA_OAEP. The attacker simply has to modify the header to and replace the algorithm with RSA1_5. Attempts to decrypt modified ciphertexts will then leak whether the decrypted message has valid PKCS #1 padding.\n\n\n### Further Analysis\nFix Commit - https://bitbucket.org/b_c/jose4j/commits/63b86581e7bfcc2d9d04ee15caea4b5bfb911f59\n\n\n\n### Timeline\n**Date reported**: 01/27/2023\n**Date fixed**: 02/09/2023\n**Date disclosed**: 04/27/2023\n",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.bitbucket.b_c:jose4j"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.9.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/google/security-research/security/advisories/GHSA-jgvc-jfgh-rjvv"
  }, {
    "type" : "WEB",
    "url" : "https://bitbucket.org/b_c/jose4j/commits/14e62a8dee9decb4ff6e0625aedc5724601bfdb6"
  }, {
    "type" : "WEB",
    "url" : "https://bitbucket.org/b_c/jose4j/commits/63b86581e7bfcc2d9d04ee15caea4b5bfb911f59"
  }, {
    "type" : "WEB",
    "url" : "https://bitbucket.org/b_c/jose4j/commits/tag/jose4j-0.9.3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/google/security-research"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-327" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-04-27T23:52:54Z",
    "nvd_published_at" : null
  }
}