CyberRota Analysis
AI-GeneratedThe vulnerability affects the RSA-OAEP decryption implementation in the NXP CAAM crypto driver used in OP-TEE, which is integrated with Linux on Arm Cortex-A cores. Exploiting this weakness allows an attacker to recover plaintext from RSA-OAEP ciphertext through a padding oracle attack, requiring approximately 1000-2000 adaptive chosen ciphertext queries. Organizations utilizing affected versions of OP-TEE, particularly those in security-sensitive environments, should prioritize applying the patch in version 4.11.0 or disabling the NXP CAAM RSA driver as a temporary workaround.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.9.0 and prior to version 4.11.0, the RSA-OAEP decryption implementation in the NXP CAAM crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Manger-style padding oracle that allows an attacker to recover RSA-OAEP plaintext with approximately 1000-2000 adaptive chosen ciphertext queries. Version 4.11.0 contains a patch. As a workaround, disable the NXP CAAM RSA driver with `CFG_CRYPTO_DRV_RSA=n`.
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