CVE Vulnerability

CVE-2022-39343

Azure RTOS FileX is a FAT-compatible file system that’s fully integrated with Azure RTOS ThreadX. In versions before 6.2.0, the Fault Tolerant feature of Azure RTOS FileX includes integer under and overflows which may be exploited to achieve buffer overflow and modify memory contents. When a valid log file with correct ID and checksum is detected by the `_fx_fault_tolerant_enable` function an attempt to recover the previous failed write operation is taken by call of `_fx_fault_tolerant_apply_logs`. This function iterates through the log entries and performs required recovery operations. When properly crafted a log including entries of type `FX_FAULT_TOLERANT_DIR_LOG_TYPE` may be utilized to introduce unexpected behavior. This issue has been patched in version 6.2.0. A workaround to fix line 218 in fx_fault_tolerant_apply_logs.c is documented in the GHSA.

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/azure-rtos/filex/security/advisories/GHSA-8jqf-wjhq-4w9f Exploit Mitigation
https://github.com/azure-rtos/filex/blob/master/common/src/fx_fault_tolerant_apply_logs.c#L218 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:microsoft:azure_rtos_filex:*:*:*:*:*:*:*:*
Information

Published : 2022-11-08 08:15

Updated : 2022-11-10 12:32

NVD link : CVE-2022-39343

Mitre link : CVE-2022-39343

Products Affected
No products.
CWE
CWE-190

CWE-191

Integer Underflow (Wrap or Wraparound)