Horizon Alert
Summary of the vulnerability and why it matters
Apache HTTP Server versions 2.4.17 through 2.4.38 are affected by a vulnerability that could allow unauthorized code execution. This flaw exists when using specific Multi-Processing Modules (MPMs) like event, worker, or prefork. Code running with lower privileges could potentially gain the privileges of the parent process, which is often root.
- Apache HTTP Server
- Code execution with elevated privileges
- Compromised systems and data
Attack Path
How an attacker could exploit the issue
This vulnerability allows for code execution with elevated privileges. An attacker could leverage this by manipulating a specific system component, leading to unauthorized control. The impact could involve the compromise of sensitive data and disruption of services.
- Code executes in less-privileged processes.
- Attacker manipulates the scoreboard.
- Attacker gains parent process privileges.
Live Threat
Current exploitation, exposure, and threat context
The Apache HTTP Server vulnerability allows code execution with elevated privileges. Attackers can exploit this by manipulating specific server processes, potentially leading to unauthorized access and control. This could impact system integrity and the confidentiality of data.
- Likely attacker skill level: Low
- Required access or conditions: Local code execution
- Business risk or urgency: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A vulnerability exists in Apache HTTP Server versions 2.4.17 through 2.4.38 when using MPM event, worker, or prefork. This flaw allows code executing in less-privileged child processes or threads to potentially run arbitrary code with the privileges of the parent process, which is typically root. The issue is exploitable by manipulating the scoreboard, and it affects non-Unix systems.
- Identify all Apache HTTP Server instances.
- Reduce exposure or isolate risk.
- Apply vendor fixes and validate.
- Monitor for related activity.
