Trusted Firmware-M up to 2.1.0 mailbox_direct_reply in_vec/out_vec buffer overflow

Summaryinfo

A vulnerability was found in Trusted Firmware-M up to 2.1.0. It has been declared as critical. Affected is the function mailbox_direct_reply. The manipulation of the argument in_vec/out_vec results in buffer overflow. This vulnerability is cataloged as CVE-2024-45746. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Trusted Firmware-M up to 2.1.0. Affected is the function mailbox_direct_reply. The manipulation of the argument in_vec/out_vec with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Trusted Firmware-M through 2.1.0. User provided (and controlled) mailbox messages contain a pointer to a list of input arguments (in_vec) and output arguments (out_vec). These list pointers are never validated. Each argument list contains a buffer pointer and a buffer length field. After a PSA call, the length of the output arguments behind the unchecked pointer is updated in mailbox_direct_reply, regardless of the call result. This allows an attacker to write anywhere in the secure firmware, which can be used to take over the control flow, leading to remote code execution (RCE).

The advisory is available at trustedfirmware-m.readthedocs.io. This vulnerability is traded as CVE-2024-45746 since 09/06/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/12/2024).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Firmware Software

Vendor

• Trusted

Name

• Firmware-M

Version

• 2.0
• 2.1.0

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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