CVE-2020-17529 : Exploit Details and Defense Strategies

Apache NuttX (incubating) has an Out-of-bounds Write vulnerability in its TCP Stack, affecting versions up to and including 9.1.0 and 10.0.0. Attackers can corrupt memory by providing an invalid fragmentation offset value in the IP header.

Understanding CVE-2020-17529

This CVE involves a critical vulnerability in Apache NuttX (incubating) that allows attackers to manipulate memory through a specific TCP Stack issue.

What is CVE-2020-17529?

The vulnerability in Apache NuttX (incubating) versions up to 9.1.0 and 10.0.0 enables attackers to corrupt memory by supplying an invalid fragmentation offset value in the IP header. This vulnerability impacts builds with specific build flags enabled.

The Impact of CVE-2020-17529

The vulnerability poses a severe risk as attackers can exploit it to corrupt memory, potentially leading to unauthorized access or system crashes.

Technical Details of CVE-2020-17529

Apache NuttX (incubating) vulnerability details and affected systems.

Vulnerability Description

The Out-of-bounds Write vulnerability in the TCP Stack of Apache NuttX (incubating) versions up to 9.1.0 and 10.0.0 allows attackers to corrupt memory by providing an invalid fragmentation offset value in the IP header.

Affected Systems and Versions

Product: Apache NuttX (incubating)
Vendor: Apache Software Foundation
Versions:
<= 9.1.0 (custom version)
10.0.0

Exploitation Mechanism

Attackers exploit this vulnerability by manipulating the TCP Stack with specific build flags enabled, leading to memory corruption.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2020-17529 vulnerability.

Immediate Steps to Take

Disable CONFIG_EXPERIMENTAL and CONFIG_NET_TCP_REASSEMBLY build flags if not required.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch Apache NuttX to the latest secure versions.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply patches provided by Apache NuttX promptly to address the vulnerability and enhance system security.