Ivanti Avalanche SecureFilter allowPassThrough Authentication Bypass Vulnerability
August 15th, 2023
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 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 system.
Additional Details
Ivanti has issued an update to correct this vulnerability. More details can be found at:
https://forums.ivanti.com/s/article/New-Avalanche-Landing-Page?language=en_US
Disclosure Timeline
- 2023-05-30 - Vulnerability reported to vendor
- 2023-08-15 - Coordinated public release of advisory
Credit
06fe5fd2bc53027c4a3b7e395af0b850e7b8a044
