Use After Free Vulnerability in FreeRTOS+FAT by Real Time Engineers
CVE-2019-18178

7.5HIGH

Key Information:

Vendor

Amazon

Status
Freertos\+fat
Vendor
CVE Published:
4 November 2019

What is CVE-2019-18178?

The Real Time Engineers FreeRTOS+FAT library version 160919a contains a use after free vulnerability that can be exploited due to improper management of file handlers. Specifically, the function FF_Close() frees the file handler pxFile using ffconfigFREE, which essentially calls vPortFree(). This pointer is later reused in the FF_FlushCache() function to attempt to flush modified content from cache to disk, creating a window of opportunity for potential exploitation. Developers utilizing this version should review their implementation and apply necessary updates to mitigate associated risks.

References

https://sourceforge.net/p/freertos/bugs/199/
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.