Horizon Alert
Summary of the vulnerability and why it matters
A change in Apache HTTP Server's path normalization allows for directory traversal. This permits attackers to access files outside of designated directories. If these files are not properly protected or if CGI scripts are enabled, remote code execution can occur.
- Apache HTTP Server
- Path traversal flaw
- Data breaches, code execution
Attack Path
How an attacker could exploit the issue
A path traversal vulnerability in Apache HTTP Server allows attackers to access files outside of designated directories. When combined with specific server configurations, such as enabled CGI scripts, this can lead to unauthorized remote code execution. This vulnerability has been observed in active exploitation.
- Unprotected files outside directories.
- Attacker maps URL to files.
- Remote code execution results.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability in the Apache HTTP Server could allow an attacker to access files outside of designated directories. If specific security configurations are not in place, this could lead to the execution of malicious code on affected systems. The issue is known to be actively exploited in the wild.
- Attackers with no special skill needed.
- No authentication or prior access required.
- High business risk and urgency.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A path traversal vulnerability in Apache HTTP Server version 2.4.49 allows attackers to access files outside of designated directories. If specific configurations are in place, this could enable remote code execution, and exploitation in the wild has been observed. The initial fix was later found to be incomplete, necessitating further remediation.
- Identify Apache HTTP Server 2.4.49 instances.
- Restrict access to aliased directories.
- Apply vendor patches and validate.
- Monitor for related activity.
