CVE-2020-37159
Parallaxis · Cuckoo Clock
Parallaxis Cuckoo Clock 5.0 is vulnerable to a buffer overflow in alarm scheduling, enabling shellcode execution via EIP and EBP register overwrites.
Executive summary
Parallaxis Cuckoo Clock 5.0 contains a critical memory corruption flaw that allows attackers to execute arbitrary shellcode by exploiting the alarm scheduling function.
Vulnerability
The application suffers from a buffer overflow within the alarm scheduling feature. By submitting a malicious payload exceeding 260 bytes, an attacker can overwrite critical memory registers, including EIP and EBP, allowing for the execution of arbitrary shellcode with the privileges of the application.
Business impact
A successful exploit could lead to full remote code execution on the host machine. The CVSS score of 9.8 indicates that the vulnerability is easily exploitable and results in a total loss of confidentiality, integrity, and availability for the affected system.
Remediation
Immediate Action: Update the Parallaxis Cuckoo Clock software to the most recent version or decommission the software if it is no longer required for business operations.
Proactive Monitoring: Scan for anomalous payloads in application-specific configuration files and monitor for unexpected changes to the EIP/EBP registers during runtime.
Compensating Controls: Utilize Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) at the operating system level to mitigate the effectiveness of buffer overflow attacks.
Exploitation status
Public Exploit Available: false
Analyst recommendation
This vulnerability presents a critical risk to endpoint security due to the potential for arbitrary code execution. Users are urged to apply the vendor-provided updates immediately to secure their systems against memory corruption attacks.