CVE-2020-8620 : What You Need to Know

In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, an attacker exploiting a vulnerability can trigger an assertion failure, causing the server to exit.

Understanding CVE-2020-8620

This CVE affects BIND9 versions 9.15.6 to 9.16.5 and 9.17.0 to 9.17.3, potentially allowing attackers to disrupt server operations.

What is CVE-2020-8620?

This vulnerability in BIND allows an attacker to establish a TCP connection with the server and exploit it to trigger an assertion failure, leading to server shutdown.

The Impact of CVE-2020-8620

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Availability Impact: High
No active exploits are known at the moment.

Technical Details of CVE-2020-8620

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

Vulnerability Description

In BIND versions 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, a specially crafted TCP payload can trigger an assertion failure.

Affected Systems and Versions

Affected Versions: 9.17.0 -> 9.17.3
Unaffected Versions: 9.16.6, 9.17.4

Exploitation Mechanism

An attacker establishing a TCP connection with the server can exploit this vulnerability.

Mitigation and Prevention

Protect your systems from CVE-2020-8620 with the following steps:

Immediate Steps to Take

Upgrade to BIND versions 9.16.6 or 9.17.4 to mitigate the vulnerability.

Long-Term Security Practices

Regularly update BIND to the latest patched releases.

Patching and Updates

Stay informed about security advisories and promptly apply patches to secure your systems.