Horizon Alert
Summary of the vulnerability and why it matters
The vulnerability impacts applications that allow for the improper handling of data received from a less trusted source. This flaw permits a malicious actor to potentially execute arbitrary code, leading to significant business risks. The core issue involves how parameters are validated before being used in inter-process communication.
- Vulnerable application components
- Improper parameter validation
- Code execution and data compromise
Attack Path
How an attacker could exploit the issue
An attacker could exploit a vulnerability in how parameters are handled by child and parent processes. This could allow a compromised child process to direct the parent process to open web content. If combined with other vulnerabilities, this could enable the execution of arbitrary code on an affected user's computer.
- Exposed web content interaction
- Attacker controls child process
- Triggered by opening web content
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows for the execution of arbitrary code when combined with other weaknesses. An attacker could leverage this by directing a user to specific web content, which then causes a compromised child process to instruct a non-sandboxed parent process to open that content. This could lead to the execution of malicious code on the user's machine. The CISA known exploited vulnerabilities catalog indicates this is a known threat.
- Attackers with any skill level.
- No specific access or conditions needed.
- High business risk and urgency.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability could permit an attacker to execute arbitrary code on a user's computer by tricking a parent process into opening web content chosen by a compromised child process. This situation arises from insufficient vetting of parameters passed with a Prompt:Open IPC message. The business risk is the potential for unauthorized code execution, leading to data compromise or system control.
- Identify affected applications and user systems.
- Restrict network access for affected systems.
- Update applications, verify, and monitor activity.
