CVE-2020-14935 : What You Need to Know

Buffer overflows in Contiki-NG 4.4 through 4.5 allow for code execution redirection via SNMP bulk get requests.

Understanding CVE-2020-14935

Buffer overflows in Contiki-NG 4.4 through 4.5 enable attackers to redirect code execution through SNMP requests.

What is CVE-2020-14935?

Buffer overflows in Contiki-NG 4.4 through 4.5 in the SNMP bulk get request response encoding function
Lack of input length validation leads to stack buffer overflow
Allows overwriting stack regions, including the return address, redirecting code execution
Potential for remote code injection via SNMP request payload

The Impact of CVE-2020-14935

Attackers can redirect code execution to injected code, compromising system integrity
Exploitation may lead to unauthorized access or system control

Technical Details of CVE-2020-14935

Buffer overflows in Contiki-NG 4.4 through 4.5 allow for code execution redirection via SNMP requests.

Vulnerability Description

Lack of input length validation in SNMP bulk get request response encoding function
Stack buffer overflow due to unverified input message variables
Possibility of redirecting code execution to injected code

Affected Systems and Versions

Contiki-NG versions 4.4 through 4.5

Exploitation Mechanism

Attackers exploit lack of input length validation to overflow stack buffer
Redirect code execution to injected code via SNMP request payload

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches or updates promptly
Implement network segmentation to limit exposure
Monitor network traffic for suspicious SNMP activities Long-Term Security Practices
Regularly update and patch software to address vulnerabilities
Conduct security assessments and audits to identify weaknesses
Educate users on safe network practices to prevent exploitation
Employ intrusion detection systems to detect and prevent attacks
Follow secure coding practices to mitigate buffer overflow vulnerabilities

Patching and Updates

Update Contiki-NG to versions beyond 4.5 to address the buffer overflow vulnerability