Vulnerability Details CVE-2021-43997
FreeRTOS versions 10.2.0 through 10.4.5 do not prevent non-kernel code from calling the xPortRaisePrivilege internal function to raise privilege. FreeRTOS versions through 10.4.6 do not prevent a third party that has already independently gained the ability to execute injected code to achieve further privilege escalation by branching directly inside a FreeRTOS MPU API wrapper function with a manually crafted stack frame. These issues affect ARMv7-M MPU ports, and ARMv8-M ports with MPU support enabled (i.e. configENABLE_MPU set to 1). These are fixed in V10.5.0 and in V10.4.3-LTS Patch 3.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 51.3%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
References
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-2
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-3
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.6
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.5.0
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-2
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.3-LTS-Patch-3
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.4.6
- https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V10.5.0
Products affected by CVE-2021-43997
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cpe:2.3:o:amazon:freertos:10.2.0
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cpe:2.3:o:amazon:freertos:10.2.1
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cpe:2.3:o:amazon:freertos:10.3.0
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cpe:2.3:o:amazon:freertos:10.3.1
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cpe:2.3:o:amazon:freertos:10.4.0
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cpe:2.3:o:amazon:freertos:10.4.2
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cpe:2.3:o:amazon:freertos:10.4.3
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cpe:2.3:o:amazon:freertos:10.4.4
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cpe:2.3:o:amazon:freertos:10.4.5