CVE-2018-18820
A buffer overflow was discovered in the URL-authentication backend of the Icecast before 2.4.4....
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-18820- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-18820- Updated
- 2026-11-02
EUVDEUVD-2018-10536 No score
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.
- Record
EUVD-2018-10536- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w249-6p6f-4gjq
A buffer overflow was discovered in the URL-authentication backend of the Icecast before 2.4.4....
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.
- Record
GHSA-w249-6p6f-4gjq- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSVALPINE-CVE-2018-18820
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.
- Record
ALPINE-CVE-2018-18820- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-18820- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
Show 4 moreShow less
OSVDEBIAN-CVE-2018-18820
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.
- Record
DEBIAN-CVE-2018-18820- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-18820
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.
- Record
UBUNTU-CVE-2018-18820- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVMGASA-2018-0472 No score
Updated icecast packages fix security vulnerability
Buffer overflows in URL auth code if there is a "mount" definition that enables URL authentication. A malicious client could send long HTTP headers, leading to a buffer overflow and potential remote code execution (CVE-2018-18820).
- Record
MGASA-2018-0472- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10584-1 No score
icecast-2.4.4-2.1 on GA media
These are all security issues fixed in the icecast-2.4.4-2.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10584-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
icecastAlpine:v3.10 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.11 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.12 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.13 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.14 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.15 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.16 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.17 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.18 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.19 |
before 2.4.4-r0 | 2.4.4-r0 |
Show 21 moreShow less
| Package | Affected | Fixed |
|---|---|---|
icecastAlpine:v3.2 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.20 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.21 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.22 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.23 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.24 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.3 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.4 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.5 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.6 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.7 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.8 |
before 2.4.4-r0 | 2.4.4-r0 |
icecastAlpine:v3.9 |
before 2.4.4-r0 | 2.4.4-r0 |
icecast2Debian:12 |
before 2.4.4-1 | 2.4.4-1 |
icecast2Debian:13 |
before 2.4.4-1 | 2.4.4-1 |
icecast2Debian:8 |
before 2.4.0-1.1+deb8u2, plus listed versions 2.4.0-1.12.4.0-1.1+deb8u12.4.0-1.1+deb8u1~bpo70+1 |
2.4.0-1.1+deb8u2 |
icecast2Debian:9 |
before 2.4.2-1+deb9u1, plus listed versions 2.4.2-1 |
2.4.2-1+deb9u1 |
icecastMageia:6 |
before 2.4.4-1.mga6 | 2.4.4-1.mga6 |
icecast2Ubuntu:16.04:LTS |
before 2.4.2-1ubuntu0.1, plus listed versions 2.4.2-1 |
2.4.2-1ubuntu0.1 |
icecast2Ubuntu:18.04:LTS |
before 2.4.3-2ubuntu0.1, plus listed versions 2.4.3-2 |
2.4.3-2ubuntu0.1 |
icecastopenSUSE:Tumbleweed |
before 2.4.4-2.1 | 2.4.4-2.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | impulsiveness/CVE-2018-18820 | 2025-02-02 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-18820 is a high vulnerability (CVSS 8.1) in Xiph Icecast, published November 4, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 48.9%, the 98th percentile. Fixed in icecast 2.4.4-r0.
References
securitytracker.com/id/1042019
security.gentoo.org/glsa/201811-09
lists.debian.org/debian-lts-announce/2018/11/msg00033.html
openwall.com/lists/oss-security/2018/11/01/3
debian.org/security/2018/dsa-4333
nvd.nist.gov/vuln/detail/CVE-2018-18820
Show 11 moreShow less
github.com/advisories/GHSA-w249-6p6f-4gjq
security.alpinelinux.org/vuln/CVE-2018-18820
security-tracker.debian.org/tracker/CVE-2018-18820
advisories.mageia.org/MGASA-2018-0472.html
bugs.mageia.org/show_bug.cgi?id=23798
ubuntu.com/security/CVE-2018-18820
gitlab.xiph.org/xiph/icecast-server/issues/2342
lgtm.com/blog/icecast_snprintf_CVE-2018-18820
cve.org/CVERecord?id=CVE-2018-18820
suse.com/security/cve/CVE-2005-0837