CVE-2020-17528 : Security Advisory and Response

Apache NuttX (incubating) Out of Bound Write from invalid TCP Urgent length is a vulnerability that allows attackers to corrupt memory in certain versions of Apache NuttX.

Understanding CVE-2020-17528

This CVE involves an out-of-bounds write vulnerability in the TCP stack of Apache NuttX versions up to and including 9.1.0 and 10.0.0.

What is CVE-2020-17528?

The vulnerability in Apache NuttX allows an attacker to corrupt memory by providing arbitrary urgent data pointer offsets within TCP packets, potentially extending beyond the packet's length.

The Impact of CVE-2020-17528

This vulnerability could be exploited by malicious actors to compromise the integrity and security of systems running the affected versions of Apache NuttX.

Technical Details of CVE-2020-17528

Apache NuttX (incubating) Out of Bound Write from invalid TCP Urgent length

Vulnerability Description

The vulnerability enables an out-of-bounds write in the TCP stack, leading to memory corruption when manipulating urgent data pointer offsets in TCP packets.

Affected Systems and Versions

Product: Apache NuttX (incubating)
Vendor: Apache Software Foundation
Versions Affected:
Custom version less than 9.1.1
Version 10.0.0

Exploitation Mechanism

Attackers can exploit this vulnerability by supplying malicious urgent data pointer offsets within TCP packets, potentially causing memory corruption beyond the packet's boundaries.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2020-17528.

Immediate Steps to Take

Apply patches or updates provided by Apache NuttX to fix the vulnerability.
Monitor network traffic for any signs of exploitation.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.
Educate users and administrators about secure coding practices and the importance of cybersecurity.

Patching and Updates

Apache NuttX users should apply the necessary patches or updates released by the Apache Software Foundation to address the out-of-bounds write vulnerability in the TCP stack.