CVEvulnerability

CVE-2022-39343

7.8 HIGH Published 2022-11-08 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-11-08
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.6 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-120, CWE-190, CWE-191

Description

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.

Affected configurations

• microsoft azure rtos filex (< 6.2.0)

Related

Weakness · CWE (3)

  • CWE-120 Buffer Copy without Checking Size of Input weakness
  • CWE-190 Integer Overflow or Wraparound weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References