CVE-2023-4397: Buffer Overflow
First published: Tue Nov 28 2023(Updated: )
A buffer overflow vulnerability in the Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50(W) series firmware version 5.37, and USG20(W)-VPN series firmware version 5.37, could allow an authenticated local attacker with administrator privileges to cause denial-of-service (DoS) conditions by executing the CLI command with crafted strings on an affected device.
Credit: security@zyxel.com.tw
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Zyxel ZLD Firmware | =5.37 | |
| Any of | ||
| Zyxel ATP100 Firmware | ||
| Zyxel ATP100W Firmware | ||
| Zyxel Zywall ATP200 | ||
| Zyxel ATP500 Firmware | ||
| Zyxel ATP700 Firmware | ||
| Zyxel Zywall ATP800 Firmware | ||
| All of | ||
| Zyxel ZLD Firmware | =5.37 | |
| Any of | ||
| Zyxel USG Flex 100 firmware | ||
| Zyxel USG FLEX 100w firmware | ||
| Zyxel USG FLEX 200 firmware | ||
| Zyxel USG FLEX 50w | ||
| Zyxel USG FLEX 500 firmware | ||
| Zyxel USG FLEX 50(W) series firmware | ||
| Zyxel USG FLEX 700 firmware | ||
| All of | ||
| Zyxel ZLD Firmware | =5.37 | |
| Any of | ||
| Zyxel USG20 | ||
| Zyxel VPN50 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2023-4397?
The severity of CVE-2023-4397 is medium.
How can an attacker exploit CVE-2023-4397?
An attacker with administrator privileges can exploit CVE-2023-4397 by causing a denial-of-service or potentially executing arbitrary code.
Which software versions are affected by CVE-2023-4397?
Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50(W) series firmware version 5.37, and USG20(W)-VPN series firmware version 5.37 are affected by CVE-2023-4397.
Is authentication required to exploit CVE-2023-4397?
Yes, authentication is required to exploit CVE-2023-4397.
How to mitigate CVE-2023-4397?
Apply the latest firmware patch provided by Zyxel to mitigate CVE-2023-4397.
- agent/type
- agent/event
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/references
- agent/last-modified-date
- agent/severity
- agent/author
- agent/description
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-api
- agent/software-canonical-lookup-request
- vendor/zyxel
- canonical/zyxel zld firmware
- version/zyxel zld firmware/5.37
- canonical/zyxel atp100 firmware
- canonical/zyxel atp100w firmware
- canonical/zyxel zywall atp200
- canonical/zyxel atp500 firmware
- canonical/zyxel atp700 firmware
- canonical/zyxel zywall atp800 firmware
- canonical/zyxel usg flex 100 firmware
- canonical/zyxel usg flex 100w firmware
- canonical/zyxel usg flex 200 firmware
- canonical/zyxel usg flex 50w
- canonical/zyxel usg flex 500 firmware
- canonical/zyxel usg flex 50(w) series firmware
- canonical/zyxel usg flex 700 firmware
- canonical/zyxel usg20
- canonical/zyxel vpn50