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Date: Tue, 30 Aug 2022 16:25:12 +0200
From: Charles Fol <>
Subject: CVE-2022-31790 CVE-2022-31789: Watchguard XTM/Firebox firewalls:
 Multiple vulnerabilities


While performing a red-team assessment we discovered a few 
vulnerabilities on Watchguard firewalls of the XTM/Firebox brand:

Here are the different CVEs and WSGA references for the bugs:

- Xpath time-based injection in wgcgi: CVE-2022-31790, WSGA-2022-00017
- Integer overflow leading to UAF/overflow in wgagent: CVE-2022-31789, 
- Local privilege escalation from nobody to root: WSGA-2022-00018

Combined, the two latter bugs lead to pre-authentication remote code 
execution as root on XTM/Firebox devices.
Although the second bug is present in both XTM and Firebox models, the 
exploitation differs as the libc (ptmalloc) version is different, 
(respectively 2.19 and 2.28).

A very in-depth blog-post is available here:



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