CVE-2021-27504 : Exploit Details and Defense Strategies
Learn about CVE-2021-27504 affecting Texas Instruments devices running FREERTOS. Understand the impact, affected systems, and mitigation steps for this integer overflow vulnerability.
Texas Instruments devices running FREERTOS are affected by an integer overflow vulnerability in the 'malloc' function, allowing code execution.
Understanding CVE-2021-27504
This CVE affects Texas Instruments devices running FREERTOS due to an integer overflow vulnerability.
What is CVE-2021-27504?
Texas Instruments devices running FREERTOS encounter an integer overflow vulnerability in the 'malloc' function, which can lead to code execution.
The Impact of CVE-2021-27504
The vulnerability allows an attacker to trigger an integer overflow, potentially resulting in code execution on affected systems.
Technical Details of CVE-2021-27504
This section provides details on the vulnerability's description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability arises from the 'malloc' function in FREERTOS returning a valid pointer to a small buffer on extremely large values.
Affected Systems and Versions
- CC32XX: Versions less than 4.40.00.07
- SimpleLink MSP432E4XX: All versions
- SimpleLink-CC13XX: Versions less than 4.40.00
- SimpleLink-CC26XX: Versions less than 4.40.00
- SimpleLink-CC32XX: Versions less than 4.10.03
Exploitation Mechanism
Attackers can exploit this vulnerability by triggering the integer overflow in the 'malloc' function on affected Texas Instruments devices running FREERTOS.
Mitigation and Prevention
In response to CVE-2021-27504, Texas Instruments has provided the following solutions to mitigate the vulnerability.
Immediate Steps to Take
Update the following products to the specified versions:
- Texas Instruments CC32XX: Update to v4.40.00.07
- Texas Instruments SimpleLink CC13X0: Update to v4.10.03
- Texas Instruments SimpleLink CC13X2-CC26X2: Update to v4.40.00
- Texas Instruments SimpleLink CC2640R2: Update to v4.40.00
- Texas Instruments SimpleLink MSP432E4: No update currently planned
Long-Term Security Practices
Regularly update and patch Texas Instruments devices to prevent security vulnerabilities like CVE-2021-27504.
Patching and Updates
Apply manufacturer-recommended updates and security patches to ensure the security of Texas Instruments devices running FREERTOS.