cbcvebase.
CVE-2022-36971
published 2023-03-29

CVE-2022-36971: This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ivanti Avalanche 6.3.2.3490. Although authentication is…

PriorityP267high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
14.98%
96.3th percentile
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ivanti Avalanche 6.3.2.3490. 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. Was ZDI-CAN-15301.

Affected

2 ranges
VendorProductVersion rangeFixed in
ivantiavalanche——
ivantiavalanche>= 6.3.2.3490 < 6.3.46.3.4

Detection & IOCsextracted from sources · hover to see the quote

  • →Target class for exploitation is JwtTokenUtility — monitor for suspicious deserialization activity originating from or involving this class in Ivanti Avalanche ↗
  • →Authentication bypass precedes exploitation — monitor for anomalous authenticated sessions or JWT token manipulation against Ivanti Avalanche 6.3.2.3490 endpoints ↗
  • →Post-exploitation code runs as the service account — alert on unexpected process spawning or lateral movement from the Ivanti Avalanche service account context ↗
  • ·Vulnerability is confirmed on Ivanti Avalanche version 6.3.2.3490 specifically; scope of affected versions beyond this build is not defined in the source material ↗

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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