FG-IR-21-173: Buffer overflow in TFTP client library of CLI

Published Dec 7, 2021
·
Updated

A buffer overflow [CWE-121] in the TFTP client library of FortiOS, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.

Affected Software

88 affected componentsFixes available
Fortinet FortiADC>=6.2.0<=6.2.2
Fortinet FortiADC>=6.1.0<=6.1.5
Fortinet FortiADC>=6.0
Fortinet FortiADC>=5.4
Fortinet FortiADC>=5.3
Fortinet FortiADC>=5.2
Fortinet FortiADC>=5.1
Fortinet FortiADC>=5.0
Fortinet FortiAnalyzer>=7.0.0<=7.0.2
Fortinet FortiAnalyzer>=6.4.0<=6.4.7
Fortinet FortiAnalyzer>=6.2
Fortinet FortiAnalyzer>=6.0
Fortinet FortiDDoS>=5.5.0<=5.5.1
Fortinet FortiDDoS>=5.4
Fortinet FortiDDoS>=5.3
Fortinet FortiDDoS>=5.2
Fortinet FortiDDoS>=5.1
Fortinet FortiDDoS>=5.0
Fortinet FortiDDoS>=4.7
Fortinet FortiDDoS>=4.6
Fortinet FortiDDoS>=4.5
Fortinet FortiDDoS>=4.4
Fortinet FortiDDoS-F>=6.4.0<=6.4.1
Fortinet FortiDDoS-F=.
Fortinet FortiDDoS-F>=6.2.0<=6.2.2
Fortinet FortiDDoS-F>=6.1.0<=6.1.4
Fortinet FortiMail>=7.0.0<=7.0.2
Fortinet FortiMail>=6.4.0<=6.4.6
Fortinet FortiMail>=6.2.0<=6.2.7
Fortinet FortiMail>=6.0
Fortinet FortiMail>=5.4
Fortinet FortiManager>=7.0.0<=7.0.2
Fortinet FortiManager>=6.4.0<=6.4.7
Fortinet FortiManager>=6.2
Fortinet FortiManager>=6.0
Fortinet FortiNDR>=1.5.0<=1.5.2
Fortinet FortiNDR>=1.4
Fortinet FortiNDR>=1.3
Fortinet FortiNDR>=1.2
Fortinet FortiNDR>=1.1
Fortinet FortiOS>=7.0.0<=7.0.2
Fortinet FortiOS>=6.4.0<=6.4.7
Fortinet FortiOS>=6.2.0<=6.2.9
Fortinet FortiOS>=6.0.0<=6.0.13
Fortinet FortiOS>=5.6
Fortinet FortiOS>=5.4
Fortinet FortiOS>=5.2
Fortinet FortiOS>=5.0
Fortinet FortiOS-6K7K=.
Fortinet FortiOS-6K7K>=6.2.6<=6.2.7
Fortinet FortiOS-6K7K=.
Fortinet FortiOS-6K7K>=6.0.12<=6.0.17
Fortinet FortiOS-6K7K=.
Fortinet FortiPortal>=6.0.0<=6.0.10
Fortinet FortiPortal>=5.3
Fortinet FortiPortal>=5.2
Fortinet FortiPortal>=5.1
Fortinet FortiPortal>=5.0
Fortinet FortiProxy>=7.0.0<=7.0.1
Fortinet FortiProxy>=2.0.0<=2.0.7
Fortinet FortiProxy>=1.2
Fortinet FortiProxy>=1.1
Fortinet FortiProxy>=1.0
Fortinet FortiRecorder>=6.4.0<=6.4.2
Fortinet FortiRecorder>=6.0.0<=6.0.10
Fortinet FortiRecorder>=2.7.0<=2.7.7
Fortinet FortiRecorder>=2.6
Fortinet FortiSwitch>=7.0.0<=7.0.3
Fortinet FortiSwitch>=6.4.0<=6.4.9
Fortinet FortiSwitch>=6.2.0<=6.2.7
Fortinet FortiSwitch>=6.0
Fortinet FortiVoice>=6.4.0<=6.4.4
Fortinet FortiVoice>=6.0.0<=6.0.10
Fortinet FortiWeb>=6.4.0<=6.4.1
Fortinet FortiWeb>=6.3.0<=6.3.16
Fortinet FortiWeb>=6.2
Fortinet FortiWeb>=6.1
Fortinet FortiWeb>=6.0
Fortinet FortiWeb>=5.9
Fortinet FortiWeb>=5.8
Fortinet FortiWeb>=5.7
Fortinet FortiWeb>=5.6
Fortinet FortiWeb>=5.5
Fortinet FortiWeb>=5.4
Fortinet FortiWeb>=5.3
Fortinet FortiWeb>=5.2
Fortinet FortiWeb>=5.1
Fortinet FortiWeb>=5.0

Event History

Dec 7, 2021
Advisory Published
via FortiGuard·12:00 AM
Oct 25, 2024
Advisory Published
via FortiGuard·12:00 AM
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the vulnerability description of FG-IR-21-173?

FG-IR-21-173 is a buffer overflow vulnerability in the TFTP client library of FortiOS that could allow authenticated local attackers to execute arbitrary code via specially crafted command line arguments.

2

What are the affected products by FG-IR-21-173?

FG-IR-21-173 affects several Fortinet products including FortiADC, FortiAnalyzer, FortiDDoS, FortiMail, FortiManager, FortiNDR, FortiOS and others across various versions.

3

What is the severity of FG-IR-21-173?

FG-IR-21-173 is considered a critical vulnerability due to the potential for arbitrary code execution by authenticated local attackers.

4

How do I fix FG-IR-21-173?

To fix FG-IR-21-173, update the affected Fortinet products to the recommended versions listed in Fortinet's advisory.

5

Can FG-IR-21-173 be exploited remotely?

No, FG-IR-21-173 can only be exploited by authenticated local attackers, not remotely.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203