NASA cFS Aquila Remote Code Execution Vulnerability in Memory Management Module

A remote code execution vulnerability has been identified in the Memory Management Module of NASA's Core Flight System (cFS) version Aquila. This vulnerability arises from insecure permissions that allow unauthorized memory access, which can be exploited to manipulate memory structures and execute arbitrary code on the platform. The issue is exacerbated by improper validation of file paths in the OS Abstraction Layer, leading to path traversal vulnerabilities that can be exploited in conjunction with the memory management flaws.

Impact

Exploitation of this vulnerability allows for remote code execution on the affected platform.

Reproduction

The vulnerability can be reproduced by sending commands to the Memory Management Module that bypass the application's memory validation checks. This can be done using the 'MM_DUMP_MEM_TO_FILE_CMD' command, which is intended to dump memory contents to a file. By specifying an invalid memory address, the command can be manipulated to cause a segmentation fault, crashing the cFS instance. Additionally, the 'MM_FILL_MEM_CMD' and 'MM_LOAD_MEM_FROM_FILE_CMD' commands can be used to write to invalid memory locations, further demonstrating the vulnerability.

Remediation

To address this vulnerability, it is recommended to implement proper memory access validation before executing operations that involve user-defined addresses. The default configuration should not allow the entire memory space to be marked as valid without appropriate warnings. Additionally, file path validations should be strengthened to prevent writing outside designated directories, especially into sensitive system files.