Ivanti Avalanche SecureFilter allowPassThrough Authentication Bypass Vulnerability

January 19th, 2025
ZDI-25-042 ZDI-CAN-25711

CVE ID

CVE-2024-13181

CVSS Score

7.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Vendors

Ivanti

Affected Products

Avalanche

Vulnerability Details

This vulnerability allows remote attackers to partially bypass authentication on affected installations of Ivanti Avalanche. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of the allowPassThrough method. The issue results from incorrect string matching when making an authorization decision. An attacker can leverage this vulnerability to partially bypass authentication on the application.

Additional Details

Ivanti has issued an update to correct this vulnerability. More details can be found at:
https://forums.ivanti.com/s/article/Security-Advisory-Ivanti-Avalanche-6-4-7-Multiple-CVEs

Disclosure Timeline

  • 2024-12-06 - Vulnerability reported to vendor
  • 2025-01-19 - Coordinated public release of advisory
  • 2025-01-19 - Advisory Updated

Credit

Anonymous

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