Ivanti Avalanche WLAvalancheService Use-After-Free Remote Code Execution Vulnerability

April 23rd, 2024
ZDI-24-391 ZDI-CAN-22987

CVE ID

CVE-2024-27975

CVSS Score

8.8 AV:N/AC:L/PR:L/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. Authentication is required to exploit this vulnerability.

The specific flaw exists within the WLAvalancheService, which listens on TCP port 1777 by default. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.

Additional Details

Ivanti has issued an update to correct this vulnerability. More details can be found at:
https://forums.ivanti.com/s/article/Avalanche-6-4-3-Security-Hardening-and-CVEs-addressed?language=en_US

Disclosure Timeline

  • 2024-01-09 - Vulnerability reported to vendor
  • 2024-04-23 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated

Credit

Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative

Back to Advisories