Advisory Details

November 18th, 2021

Ivanti Avalanche JNLP File Improper Access Control Authentication Bypass Vulnerability

ZDI-21-1298
ZDI-CAN-14123

CVE ID CVE-2021-42124
CVSS SCORE 8.1, AV:N/AC:H/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 bypass authentication on affected installations of Ivanti Avalanche. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of JNLP files. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication on the system.
ADDITIONAL DETAILS

Fixed in version 6.3.3.
DISCLOSURE TIMELINE
  • 2021-06-30 - Vulnerability reported to vendor
  • 2021-11-18 - Coordinated public release of advisory
  • 2022-05-26 - Advisory Updated
CREDIT Piotr Bazydlo (@chudypb)
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