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ACME flaw in Cloudflare allowed attackers to reach origin servers

Security Affairs
Vulnerability

Overview

Cloudflare recently addressed a vulnerability in its ACME validation logic that could allow attackers to bypass security measures and access protected origin servers. The flaw was linked to how Cloudflare's edge servers processed requests directed at the /.well-known/acme-challenge/ path. If exploited, this could potentially grant unauthorized access to sensitive data or services hosted on those servers. The fix is crucial for organizations relying on Cloudflare for security, as it strengthens the integrity of their server access protocols. Users and administrators should ensure their systems are updated to mitigate any risks associated with this vulnerability.

Key Takeaways

  • Affected Systems: Cloudflare ACME validation logic, origin servers
  • Action Required: Cloudflare has implemented a fix for the vulnerability in its ACME HTTP-01 validation logic.
  • Timeline: Disclosed on [date not specified]

Original Article Summary

Cloudflare fixed a flaw in its ACME validation logic that could let attackers bypass security checks and access protected origin servers. Cloudflare fixed a flaw in its ACME HTTP-01 validation logic that could let attackers bypass security checks and reach origin servers. The issue stemmed from how Cloudflare’s edge handled requests to the /.well-known/acme-challenge/ path. […]

Impact

Cloudflare ACME validation logic, origin servers

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on [date not specified]

Remediation

Cloudflare has implemented a fix for the vulnerability in its ACME HTTP-01 validation logic.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability.

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