Advisory Details

May 26th, 2022

Ivanti Avalanche JwtTokenUtility Deserialization of Untrusted Data Remote Code Execution Vulnerability

CVE ID	CVE-2022-36971
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 JwtTokenUtility class. 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 2022-07-27 - Advisory Updated
CREDIT	Piotr Bazydlo (@chudypb)

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