FG-IR-21-155: Integer overflow in dhcpd daemon
First published: Tue Jul 05 2022(Updated: )
An integer overflow / wraparound vulnerability [CWE-190] in the FortiOS, FortiProxy, FortiSwitch, FortiRecoder, and FortiVoiceEnterprisedhcpd daemon may allow an unauthenticated and network adjacent attacker to crash the dhcpd deamon, resulting in potential denial of service.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FortiOS | ||
| Fortinet FortiProxy | ||
| Fortinet FortiSwitch | ||
| Fortinet FortiRecorder 400D | ||
| Fortinet FortiVoice Enterprise |
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Reference Links
Frequently Asked Questions
What is the severity of FG-IR-21-155?
The severity of FG-IR-21-155 is classified as critical due to its potential for denial of service.
How do I fix FG-IR-21-155?
To fix FG-IR-21-155, update your affected Fortinet devices to the latest firmware version provided by Fortinet.
Who is affected by FG-IR-21-155?
FG-IR-21-155 affects users of FortiOS, FortiProxy, FortiSwitch, FortiRecorder, and FortiVoice products.
What type of vulnerability is FG-IR-21-155?
FG-IR-21-155 is an integer overflow or wraparound vulnerability identified by CWE-190.
Can FG-IR-21-155 be exploited remotely?
Yes, FG-IR-21-155 can be exploited by an unauthenticated and network adjacent attacker.
- collector/fortiguard-psirt-latest
- source/FortiGuard
- alias/CVE-2021-42755
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- collector/fortiguard-psirt
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- vendor/fortinet
- canonical/fortios
- canonical/fortinet fortiproxy
- canonical/fortinet fortiswitch
- canonical/fortinet fortirecorder 400d
- canonical/fortinet fortivoice enterprise