CVE-2020-35857 : Vulnerability Insights and Analysis

This CVE record pertains to an issue discovered in the trust-dns-server crate for Rust, affecting versions before 0.18.1. The vulnerability involves mishandling of DNS MX and SRV null targets, leading to stack consumption.

Understanding CVE-2020-35857

This section provides insights into the nature and impact of CVE-2020-35857.

What is CVE-2020-35857?

CVE-2020-35857 is a vulnerability found in the trust-dns-server crate prior to version 0.18.1 in Rust. It arises from the incorrect handling of DNS MX and SRV null targets, resulting in stack consumption.

The Impact of CVE-2020-35857

The mishandling of DNS MX and SRV null targets in trust-dns-server can lead to stack consumption, potentially causing denial of service or other security risks.

Technical Details of CVE-2020-35857

Explore the technical aspects of CVE-2020-35857 to understand its implications.

Vulnerability Description

The vulnerability in trust-dns-server before version 0.18.1 allows for the mishandling of DNS MX and SRV null targets, leading to stack consumption.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Affected Versions: All versions before 0.18.1

Exploitation Mechanism

The vulnerability can be exploited by crafting malicious DNS requests containing MX and SRV null targets, triggering the stack consumption flaw.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2020-35857.

Immediate Steps to Take

Update trust-dns-server to version 0.18.1 or later to patch the vulnerability.
Monitor network traffic for any suspicious DNS requests that could indicate exploitation.

Long-Term Security Practices

Regularly update software dependencies to ensure the latest security patches are applied.
Conduct security audits and code reviews to identify and address potential vulnerabilities.

Patching and Updates

Ensure timely patching and updates for trust-dns-server to mitigate the CVE-2020-35857 vulnerability.