Critical Vulnerability in HTTP-Daemon Affects Multiple Ubuntu Releases
Severity: High (Score: 74.0)
Sources: Ubuntu, Linuxsecurity
Published: · Updated:
Keywords: ubuntu, http, http-daemon, usn-8419-1, security, issue, affects
Severity indicators: issue, security issue
Summary
A security vulnerability has been identified in the HTTP-Daemon affecting various Ubuntu versions, including 26.04 LTS and earlier releases down to 14.04 LTS. The flaw allows remote attackers to execute arbitrary commands, create or overwrite files, and potentially expose sensitive information through specially crafted network traffic. This issue arises from improper handling of untrusted input by the HTTP-Daemon. Users are advised to update to the latest package versions to mitigate the risk. The vulnerability has been assigned Ubuntu Security Notice USN-8419-1. Affected packages include libhttp-daemon-perl across multiple Ubuntu releases. Standard system updates will apply the necessary fixes. Ubuntu Pro users have additional support for older versions. Key Points: • HTTP-Daemon vulnerability allows remote command execution on affected Ubuntu systems. • Multiple Ubuntu versions from 14.04 LTS to 26.04 LTS are impacted. • Users are urged to update their systems to the latest package versions immediately.
Detailed Analysis
**Impact** Multiple Ubuntu releases and their derivatives are affected, including versions 14.04 LTS through 26.04 LTS. The vulnerability allows remote attackers to execute arbitrary commands, create or overwrite files, or expose sensitive information, potentially impacting any organization using these Ubuntu versions globally. The scope includes both standard and extended security maintenance (ESM) supported systems, affecting a broad range of sectors relying on Ubuntu servers. **Technical Details** The vulnerability arises from improper handling of untrusted input by the libhttp-daemon-perl package, which implements a simple HTTP server class. Attackers can exploit this by sending specially crafted network traffic to trigger arbitrary code execution or file manipulation. No CVE identifier or specific malware/tools are mentioned. The attack vector is remote network exploitation targeting the HTTP-Daemon component, corresponding to the execution and impact stages of the kill chain. No IOCs are provided. **Recommended Response** Apply the updated libhttp-daemon-perl package versions specific to each Ubuntu release immediately, including those available via Ubuntu Pro for ESM-supported systems. Perform standard system updates to ensure all necessary changes are applied. Monitor network traffic for unusual HTTP requests that could indicate exploitation attempts. No additional detection signatures or mitigation measures are detailed in the sources.
Source articles (2)
- USN-8419-1: HTTP — Ubuntu · 2026-06-10
HTTP-Daemon could be made to run programs if it received specially crafted network traffic. It was discovered that HTTP-Daemon incorrectly handled untrusted input under certain circumstances. A remote… - Ubuntu 8419-1: HTTP — Linuxsecurity · 2026-06-10
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS…
Timeline
- 2026-06-10 — Security vulnerability disclosed: Ubuntu announced a critical vulnerability in HTTP-Daemon affecting multiple releases, allowing remote command execution.
- 2026-06-10 — Patch available for affected systems: Ubuntu provided updated package versions to address the HTTP-Daemon vulnerability across all affected releases.
Related entities
- Data Breach (Attack Type)
- CWE-200 - Exposure of Sensitive Information (Cwe)
- CWE-78 - OS Command Injection (Cwe)
- T1059 - Command and Scripting Interpreter (Mitre Attack)
- Perl (Tool)
- Ubuntu (Company)