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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | icecast2 | 2.4.4-1 | — |
| Debian 12 | icecast2 | 2.4.4-1 | — |
| Debian 9 | icecast2 | 2.4.2-1+deb9u1 | DSA-4333-1 |
| Debian 8 | icecast2 | 2.4.0-1.1+deb8u2 | DLA-1588-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | icecast2 | 2.4.3-2ubuntu0.1 | — |
| Ubuntu 16.04 LTS | icecast2 | 2.4.2-1ubuntu0.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | icecast | 2.4.4-2.1 | openSUSE-SU-2024:10584-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | icecast | 2.4.4-r0 | — |
| Alpine v3.23 | icecast | 2.4.4-r0 | — |
| Alpine v3.22 | icecast | 2.4.4-r0 | — |
| Alpine v3.21 | icecast | 2.4.4-r0 | — |
| Alpine v3.20 | icecast | 2.4.4-r0 | — |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | icecast | 2.4.4-r0 | — |
| Alpine v3.18 | icecast | 2.4.4-r0 | — |
| Alpine v3.17 | icecast | 2.4.4-r0 | — |
| Alpine v3.16 | icecast | 2.4.4-r0 | — |
| Alpine v3.15 | icecast | 2.4.4-r0 | — |
| Alpine v3.14 | icecast | 2.4.4-r0 | — |
| Alpine v3.13 | icecast | 2.4.4-r0 | — |
| Alpine v3.12 | icecast | 2.4.4-r0 | — |
| Alpine v3.11 | icecast | 2.4.4-r0 | — |
| Alpine v3.10 | icecast | 2.4.4-r0 | — |
| Alpine v3.9 | icecast | 2.4.4-r0 | — |
| Alpine v3.8 | icecast | 2.4.4-r0 | — |
| Alpine v3.7 | icecast | 2.4.4-r0 | — |
| Alpine v3.6 | icecast | 2.4.4-r0 | — |
| Alpine v3.5 | icecast | 2.4.4-r0 | — |
| Alpine v3.4 | icecast | 2.4.4-r0 | — |
| Alpine v3.3 | icecast | 2.4.4-r0 | — |
| Alpine v3.2 | icecast | 2.4.4-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
impulsiveness/CVE-2018-18820 ★ 2 · Feb 2, 2025
CVE-2018-18820 checker for Icecast servers
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- DSA-4333-1 icecast2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1588-1 icecast2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10584-1 icecast-2.4.4-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 1042019 vdb-entry
- GLSA-201811-09 vendor-advisory
- [debian-lts-announce] 20181126 [SECURITY] [DLA-1588-1] icecast2 security update mailing-list
- [oss-security] 20181101 Icecast 2.4.4 - CVE-2018-18820 - buffer overflow in url-auth mailing-list
- DSA-4333 vendor-advisory