Advisory Details

November 10th, 2021

Ivanti Avalanche EnterpriseServer Service Unrestricted File Upload Remote Code Execution Vulnerability

ZDI-21-1301
ZDI-CAN-15251

CVE ID CVE-2021-42133
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 saveConfig method. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this vulnerability to execute code in the context of the service account.

ADDITIONAL DETAILS

Fixed in version 6.3.3.


DISCLOSURE TIMELINE
  • 2021-09-29 - Vulnerability reported to vendor
  • 2021-11-10 - Coordinated public release of advisory
CREDIT chudy
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