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Fencer Vulns
high 8.1

CVE-2018-18820 in the critical feed json

A buffer overflow was discovered in the URL-authentication backend of the Icecast before 2.4.4.

published 2018-11-05 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10536

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
48.9%
EPSS 48.9% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

  • xiph icecast 2.4.4
  • icecast2 Debian 13, Debian 12 2.4.4-1

debian advisories DEBIAN-CVE-2018-18820

  • icecast2 Ubuntu 16.04 LTS 2.4.2-1ubuntu0.1
  • icecast2 Ubuntu 18.04 LTS 2.4.3-2ubuntu0.1

ubuntu advisories UBUNTU-CVE-2018-18820

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • icecast openSUSE Tumbleweed 2.4.4-2.1

opensuse advisories openSUSE-SU-2024:10584-1

  • icecast Alpine 3.24, Alpine 3.23, Alpine 3.22 +20 more 2.4.4-r0

alpine advisories ALPINE-CVE-2018-18820

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-18820 updated cvss 7.3

icecast: buffer overflow in URL auth code

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

48.94% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.