Advisory Details

May 26th, 2022

Ivanti Avalanche Web File Server Service Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI-22-779
ZDI-CAN-15330

CVE ID
CVSS SCORE 9.8, (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Ivanti
AFFECTED PRODUCTS Avalanche
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ivanti Avalanche. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the Web File Server service. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the service account.

ADDITIONAL DETAILS Ivanti has issued an update to correct this vulnerability. More details can be found at:
https://download.wavelink.com/Files/avalanche_v6.3.4_release_notes.txt
DISCLOSURE TIMELINE
  • 2021-10-22 - Vulnerability reported to vendor
  • 2022-05-26 - Coordinated public release of advisory
  • 2022-05-26 - Advisory Updated
CREDIT Piotr Bazydlo (@chudypb)
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