CVE-2020-6077 Denial of service in Videolabs

What is CVE-2020-6077?

CVE-2020-6077 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 24 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.

Weakness: CWE-125

Which versions are affected by CVE-2020-6077?

It affects 2 products.

Products include Debian Debian Linux, Videolabs Libmicrodns.

How do I fix CVE-2020-6077?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-6077 being exploited?

There is no known exploitation of CVE-2020-6077 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-6077, GHSA-pmrj-hfp3-5wh4, UBUNTU-CVE-2020-6077.