CVE-2023-6397
Medium
Description
A null pointer dereference vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1 and USG FLEX series firmware versions from 4.50 through 5.37 Patch 1 could allow a LAN-based attacker to cause denial-of-service (DoS) conditions by downloading a crafted RAR compressed file onto a LAN-side host if the firewall has the “Anti-Malware” feature enabled.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Zyxel Atp100 Firmware
PublishedFeb 20, 2024
First seenFeb 20, 2024
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- zyxel atp100_firmware5.37 or later
- zyxel atp100w_firmware5.37 or later
- zyxel atp200_firmware5.37 or later
- zyxel atp500_firmware5.37 or later
- zyxel atp700_firmware5.37 or later
- zyxel atp800_firmware5.37 or later
- zyxel usg_flex_100_firmware5.37 or later
- zyxel usg_flex_100ax_firmware5.37 or later
- zyxel usg_flex_100h_firmware5.37 or later
- zyxel usg_flex_100w_firmware5.37 or later
- zyxel usg_flex_200_firmware5.37 or later
- zyxel usg_flex_200h_firmware5.37 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zyxel atp100_firmware | 4.32 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel atp100w_firmware | 4.32 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel atp200_firmware | 4.32 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel atp500_firmware | 4.32 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel atp700_firmware | 4.32 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel atp800_firmware | 4.32 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_100_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_100ax_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_100h_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_100w_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_200_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_200h_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_200hp_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_50_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_500_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_500h_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_50w_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_700_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
| zyxel usg_flex_700h_firmware | 4.50 ≤ v < 5.37, 5.37 | 5.37 |
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