CyberRota Analysis
AI-GeneratedThe vulnerability affects the OpenIDC/cjose library in Java, specifically in its JWE decryption process for AES Key Wrap algorithms, which fails to validate the length of the attacker-supplied encrypted key. This oversight allows remote, unauthenticated attackers to exploit the flaw, potentially leading to denial of service or further memory corruption through out-of-bounds heap writes. Organizations using affected versions of cjose should prioritize upgrading to version 0.6.2.5 or, if immediate upgrades are not feasible, implement measures to reject untrusted JWEs using the vulnerable AES Key Wrap algorithms.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). Prior to version 0.6.2.5, cjose's JWE decryption path for the AES Key Wrap key-management algorithms (`alg` = `A128KW`, `A192KW`, `A256KW`) does not validate the length of the attacker-supplied `encrypted_key` (JWE Encrypted Key) before unwrapping it into a fixed-size, heap-allocated Content Encryption Key (CEK) buffer. A remote, unauthenticated attacker who can submit a crafted JWE to an application that decrypts it with an AES-KW symmetric key can trigger an out-of-bounds heap write, corrupting the heap. This leads at minimum to a crash (denial of service) and, depending on the heap layout and allocator, may be leverageable for further memory-corruption impact. `cjose_jwe_import()` / `cjose_jwe_decrypt()` are pre-authentication entry points: they parse and process fully attacker-controlled input. Upgrade to cjose 0.6.2.5 to receive a patch. If upgrading is not immediately possible, reject the AES Key Wrap algorithms (`A128KW`/`A192KW`/`A256KW`) for untrusted JWEs at the application layer.