CyberRota Analysis
AI-GeneratedThe Hisilicon HPRE crypto driver in OP-TEE versions 4.5.0 to 4.10.0 is vulnerable due to its use of non-constant-time `memcmp()` for label hash verification, leading to a Bleichenbacher-style padding oracle attack that can allow an attacker to recover RSA PKCS#1 v1.5 plaintext. Organizations using affected Linux systems with OP-TEE should prioritize patching to version 4.11.0 or disable the Hisilicon HPRE RSA driver to mitigate this risk. Given the potential for sensitive data exposure, this vulnerability warrants immediate attention, especially in environments handling cryptographic operations.
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 4.5.0 and prior to version 4.11.0, the RSA PKCS#1 v1.5 decryption implementation in the Hisilicon HPRE crypto driver uses non-constant-time `memcmp()` for label hash verification and has multiple distinguishable error paths. This creates a Bleichenbacher-style padding oracle that allows an attacker to recover RSA PKCS#1 v1.5 plaintext. Version 4.11.0 contains a patch. As a workaround, disable Hisilicon HPRE RSA driver with `CFG_HISILICON_ACC_V3=n`.
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