CVE-2024-6343: Buffer Overflow
First published: Tue Sep 03 2024(Updated: )
A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an authenticated attacker with administrator privileges to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
Credit: security@zyxel.com.tw
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Zyxel ZLD Firmware | >=4.32<5.39 | |
| 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 | >=4.50<5.39 | |
| Any of | ||
| Zyxel USG Flex 100 firmware | ||
| Zyxel USG FLEX 100ax firmware | ||
| Zyxel USG FLEX 100w firmware | ||
| Zyxel USG FLEX 200 firmware | ||
| Zyxel USG FLEX 50w | ||
| Zyxel USG FLEX 500 firmware | ||
| Zyxel USG FLEX 700 firmware | ||
| All of | ||
| Zyxel ZLD Firmware | >=4.16<5.39 | |
| Zyxel USG FLEX 50(W) series firmware | ||
| All of | ||
| Zyxel ZLD Firmware | >=4.16<5.39 | |
| Zyxel USG20 |
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Frequently Asked Questions
What is the severity of CVE-2024-6343?
CVE-2024-6343 is a high-severity buffer overflow vulnerability in Zyxel firmware.
How do I fix CVE-2024-6343?
To fix CVE-2024-6343, update the affected Zyxel firmware to version 5.39 or later.
Which versions of firmware are affected by CVE-2024-6343?
CVE-2024-6343 affects Zyxel ATP series firmware versions from 4.32 to 5.38 and some USG FLEX and USG20(VPN) series firmware.
What could an attacker exploit in CVE-2024-6343?
An attacker could exploit CVE-2024-6343 to cause a buffer overflow, potentially allowing remote code execution.
Is there any workaround for CVE-2024-6343?
There are no effective workarounds for CVE-2024-6343; the best mitigation is to update the firmware.
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- agent/severity
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- agent/event
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/zyxel
- canonical/zyxel zld firmware
- version/zyxel zld firmware/4.32
- 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
- version/zyxel zld firmware/4.50
- canonical/zyxel usg flex 100 firmware
- canonical/zyxel usg flex 100ax 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 700 firmware
- version/zyxel zld firmware/4.16
- canonical/zyxel usg flex 50(w) series firmware
- canonical/zyxel usg20