CVE-2020-35684 : Exploit Details and Defense Strategies

An issue was discovered in HCC Nichestack 3.0 where the TCP checksum computation function may read out of bounds due to an unchecked value of the IP payload size.

Understanding CVE-2020-35684

This CVE involves a vulnerability in the code that parses TCP packets in HCC Nichestack 3.0.

What is CVE-2020-35684?

The vulnerability arises from relying on an unchecked value of the IP payload size to compute the length of the TCP payload within the TCP checksum computation function.

The Impact of CVE-2020-35684

The TCP checksum computation function may read out of bounds, leading to a low-impact write-out-of-bounds scenario.

Technical Details of CVE-2020-35684

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue stems from improper handling of the IP payload size in the TCP checksum computation function.

Affected Systems and Versions

Product: HCC Nichestack 3.0
Vendor: N/A
Versions: N/A

Exploitation Mechanism

Exploiting this vulnerability involves manipulating the IP payload size to trigger out-of-bounds reads in the TCP checksum computation function.

Mitigation and Prevention

Protecting systems from CVE-2020-35684 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches or updates provided by the vendor.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.
Conduct regular security audits and assessments.

Patching and Updates

Stay informed about security advisories from the vendor.
Apply patches promptly to mitigate the risk of exploitation.