Advisory Details

November 19th, 2021

Ivanti Avalanche MapShare Service Command Injection Remote Code Execution Vulnerability

ZDI-21-1325
ZDI-CAN-15168

CVE ID CVE-2021-42129
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 mapShare method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account.

ADDITIONAL DETAILS

Fixed in version Avalanche 6.3.3


DISCLOSURE TIMELINE
  • 2021-09-22 - Vulnerability reported to vendor
  • 2021-11-19 - Coordinated public release of advisory
  • 2022-05-26 - Advisory Updated
CREDIT Piotr Bazydlo (@chudypb)
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