Local privilege escalation via unchecked backup path
Published Jul 18, 2022 · Updated Oct 22, 2024
Improper privilege management in Fortinet FortiClient Windows allows local users to write arbitrary files as SYSTEM via configuration backup. The SYSTEM scheduler service invokes FCConfig.exe with a backup path that is validated only in the Electron UI, so direct BackupConfig calls bypass destination permission checks. Any local user able to run the client can target protected paths in 6.0.0 through 6.0.10, 6.2.0 through 6.2.9, 6.4.0 through 6.4.7, and 7.0.0 through 7.0.3, including an administrator startup folder for later code execution.
Summary
What happened
Improper privilege management in Fortinet FortiClient Windows allows local users to write arbitrary files as SYSTEM via configuration backup. The SYSTEM scheduler service invokes FCConfig.exe with a backup path that is validated only in the Electron UI, so direct BackupConfig calls bypass destination permission checks. Any local user able to run the client can target protected paths in 6.0.0 through 6.0.10, 6.2.0 through 6.2.9, 6.4.0 through 6.4.7, and 7.0.0 through 7.0.3, including an administrator startup folder for later code execution.
The record
- CVE
- CVE-2022-26113
- Published
- Jul 18, 2022
- Updated
- Oct 22, 2024
- Vendor
- Fortinet
- Product
- FortiClient Windows
- Classifications
- CWE-250, CWE-269, T1547.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 18, 2022CVE publishedPublication date reported by the CVE source.
- Oct 22, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=FortiClientWindows 7.0.0 through 7.0.3, 6.4.0 through 6.4.7, 6.2.0 through 6.2.9, 6.0.0 through 6.0.10
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- BackupConfig arbitrary file-write proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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