Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in the Cronicle task scheduler allows an attacker to inject malicious scripts by controlling a user's full name. When an administrator views the activity log, this script can execute, potentially leading to administrator takeover and command execution. The main concern is confirming relevance and exposure.
- Malicious names can hijack administrator sessions.
- Affects critical scheduling and automation functions.
- Confirm if Cronicle is deployed and exposed.
Attack Path
How an attacker could exploit the issue
An attacker can compromise an administrator's account by first bypassing input filters to plant malicious script in a user's name. This script executes when an administrator views the activity log, allowing the attacker to take over the administrator session and potentially run commands on the system. This attack can be initiated by an authenticated non-administrator who can update their own name, or by an anonymous attacker if account self-registration is enabled and the name field is not properly sanitized.
- An attacker controls user name input.
- An administrator views the activity log.
- Administrator takeover and command execution.
Live Threat
Current exploitation, exposure, and threat context
An authenticated user, or an unauthenticated user during self-registration if `free_accounts` is enabled, could inject script into the administrator Activity Log. This script would execute when an administrator views the log, potentially leading to administrator session takeover and subsequent command execution through Cronicle's privileged features.
- Administrator sessions and command execution.
- Script injection via crafted user names.
- Complete system compromise and control.
Operational Fix
Recommended remediation, mitigation, and detection steps
Real-world ownership of this vulnerability likely falls to the platform or infrastructure teams responsible for managing the Cronicle deployment, in coordination with application owners who utilize its scheduling capabilities. The initial practical move is to identify all instances of Cronicle within your environment, confirm their network exposure and business criticality, and then ascertain the accountable owner for each instance to plan remediation based on assessed risk.
- Platform or infrastructure teams should own the issue.
- Verify Cronicle instance exposure and criticality.
- Plan remediation based on identified risk.
