Vulnerability Description
An integer overflow vulnerability in the source code of the QuickSec IPSec toolkit used in the VPN feature of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions on an affected device by sending a crafted IKE packet.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | Zld | >= 4.32, <= 5.37 |
| Zyxel | Atp100 | - |
| Zyxel | Atp100W | - |
| Zyxel | Atp200 | - |
| Zyxel | Atp500 | - |
| Zyxel | Atp700 | - |
| Zyxel | Atp800 | - |
| Zyxel | Usg Flex 100 | - |
| Zyxel | Usg Flex 100W | - |
| Zyxel | Usg Flex 200 | - |
| Zyxel | Usg Flex 50 | - |
| Zyxel | Usg Flex 500 | - |
| Zyxel | Usg Flex 50W | - |
| Zyxel | Usg Flex 700 | - |
| Zyxel | Usg 20W-Vpn | - |
| Zyxel | Vpn50W | - |
| Zyxel | Vpn100 | - |
| Zyxel | Vpn1000 | - |
| Zyxel | Vpn300 | - |
| Zyxel | Vpn50 | - |
Related Weaknesses (CWE)
References
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisVendor Advisory
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisVendor Advisory
FAQ
What is CVE-2023-4398?
CVE-2023-4398 is a vulnerability with a CVSS score of 7.5 (HIGH). An integer overflow vulnerability in the source code of the QuickSec IPSec toolkit used in the VPN feature of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware version...
How severe is CVE-2023-4398?
CVE-2023-4398 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-4398?
Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Zld, Zyxel Atp100, Zyxel Atp100W, Zyxel Atp200, Zyxel Atp500.