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CVE-2022-46152
No affected components available
OP-TEE Trusted OS is the secure side implementation of OP-TEE project, a Trusted Execution Environment. Versions prior to 3.19.0, contain an Improper Validation of Array Index vulnerability. The function cleanup_shm_refs() is called by both entry_invoke_command() and entry_open_session(). The commands OPTEE_MSG_CMD_OPEN_SESSION and OPTEE_MSG_CMD_INVOKE_COMMAND can be executed from the normal world via an OP-TEE SMC. This function is not validating the num_params argument, which is only limited to OPTEE_MSG_MAX_NUM_PARAMS (127) in the function get_cmd_buffer(). Therefore, an attacker in the normal world can craft an SMC call that will cause out-of-bounds reading in cleanup_shm_refs and potentially freeing of fake-objects in the function mobj_put(). A normal-world attacker with permission to execute SMC instructions may exploit this flaw. Maintainers believe this problem permits local privilege escalation from the normal world to the secure world. Version 3.19.0 contains a fix for this issue. There are no known workarounds.
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
A proof of concept is available for this vulnerability (1 exploit found).
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