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CVE-2022-39343— Azure RTOS FileX vulnerable to Buffer Offerflow

Quick assessment

Affected
azure-rtos filex
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Azure RTOS FileX是Azure RTOS开源的一个与 FAT 兼容的文件系统。 Azure RTOS FileX 6.2.0之前版本存在安全漏洞，该漏洞源于容错功能包括整数不足和溢出，可被利用来实现缓冲区溢出和修改内存内容。

CVSS 5.6 · Medium EPSS 0.89% · P58

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-39343

Vulnerability Information
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Vulnerability Title
Azure RTOS FileX vulnerable to Buffer Offerflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Azure RTOS FileX 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Azure RTOS FileX是Azure RTOS开源的一个与 FAT 兼容的文件系统。 Azure RTOS FileX 6.2.0之前版本存在安全漏洞，该漏洞源于容错功能包括整数不足和溢出，可被利用来实现缓冲区溢出和修改内存内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
azure-rtos filex < 6.2.0 -

II. Public POCs for CVE-2022-39343

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III. Intelligence Information for CVE-2022-39343

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Vendor Advisories for CVE-2022-39343 (1)

Other References for CVE-2022-39343 (1)

IV. Related Vulnerabilities

Same product: filex
Same vendor: azure-rtos
Same weakness: CWE-120

V. Comments for CVE-2022-39343

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