CVE-2018-18820 Memory corruption in n/a

What is CVE-2018-18820?

CVE-2018-18820 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 5 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A buffer overflow was discovered in the URL-authentication backend of the Icecast before 2.4.4. If the backend is enabled, then any malicious HTTP client can send a request for that specific resource including a crafted header, leading to denial of service and potentially remote code execution.

Weakness: CWE-119

Which versions are affected by CVE-2018-18820?

It affects 2 products.

Products include Debian Debian Linux, Xiph Icecast.

How do I fix CVE-2018-18820?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-18820 being exploited?

There is no known exploitation of CVE-2018-18820 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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 ALPINE-CVE-2018-18820, DEBIAN-CVE-2018-18820, DLA-1588-1, DSA-4333-1, GHSA-w249-6p6f-4gjq, MGASA-2018-0472 and 1 more.