CVE-2022-46152
HighCVSS 8.2Summary
OP-TEE Trusted OS, będący bezpieczną implementacją projektu OP-TEE, zawiera podatność na niewłaściwą walidację indeksu tablicy w wersjach przed 3.19.0. Funkcja `cleanup_shm_refs()` nie waliduje argumentu `num_params`, co pozwala atakującemu na wywołanie odczytu poza zakresem.
Risk Assessment
Atakujący z normalnego świata, posiadający uprawnienia do wykonywania instrukcji SMC, może wykorzystać tę podatność do eskalacji uprawnień lokalnych z normalnego świata do bezpiecznego świata, co stwarza poważne zagrożenie dla bezpieczeństwa systemu.
Recommendation
Zaleca się aktualizację do wersji 3.19.0 lub nowszej, która zawiera poprawkę dla tej podatności. Nie ma znanych obejść dla tego problemu.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS