Horizon Alert
Summary of the vulnerability and why it matters
A critical vulnerability in Altium on-premises Enterprise Server allows authenticated users to write arbitrary files to the server filesystem, potentially leading to remote code execution or service takeover. This issue is mitigated in Altium 365 cloud deployments.
- Flaw lets authenticated users write files anywhere.
- Matters if you use Altium on-premises servers.
- Confirm relevance and potential exposure.
Attack Path
How an attacker could exploit the issue
An attacker with authenticated access to the Altium Enterprise Server Vault Service could exploit a path traversal vulnerability. By submitting a specially crafted request with an absolute path, they could bypass the intended storage location and write files to any location on the server that the service account has permissions for. This could lead to remote code execution, complete service takeover, or denial of service.
- Authenticated access required.
- Crafted path bypasses storage root.
- Arbitrary file write to server.
Live Threat
Current exploitation, exposure, and threat context
An authenticated user could write arbitrary files to any location on the server's filesystem, potentially leading to remote code execution, service takeover, or denial of service when content-controlled files are placed in web-accessible directories or used to overwrite critical application components.
- System files and configurations.
- Arbitrary file writes via crafted requests.
- Remote code execution or service disruption.
Operational Fix
Recommended remediation, mitigation, and detection steps
The Altium On-Prem Enterprise Server product is affected, suggesting that infrastructure and platform teams, along with potentially security and vendor management teams, are responsible for remediation. The first practical step involves identifying all instances of the affected product, assessing their network exposure and business criticality, and confirming ownership before planning remediation activities.
- Infrastructure or platform teams own the issue.
- Verify affected product reachability and criticality.
- Plan remediation based on identified risks.
