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MEDIUM · 6.5

CVE-2023-6397

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 all...

Vulnerability 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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
ZyxelAtp100 Firmware>= 4.32, < 5.37
ZyxelAtp100-
ZyxelAtp100W Firmware>= 4.32, < 5.37
ZyxelAtp100W-
ZyxelAtp200 Firmware>= 4.32, < 5.37
ZyxelAtp200-
ZyxelAtp500 Firmware>= 4.32, < 5.37
ZyxelAtp500-
ZyxelAtp700 Firmware>= 4.32, < 5.37
ZyxelAtp700-
ZyxelAtp800 Firmware>= 4.32, < 5.37
ZyxelAtp800-
ZyxelUsg Flex 100 Firmware>= 4.50, < 5.37
ZyxelUsg Flex 100-
ZyxelUsg Flex 100Ax Firmware>= 4.50, < 5.37
ZyxelUsg Flex 100Ax-
ZyxelUsg Flex 100H Firmware>= 4.50, < 5.37
ZyxelUsg Flex 100H-
ZyxelUsg Flex 100W Firmware>= 4.50, < 5.37
ZyxelUsg Flex 100W-

Related Weaknesses (CWE)

CWE-476

References

FAQ

What is CVE-2023-6397?

CVE-2023-6397 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 all...

How severe is CVE-2023-6397?

CVE-2023-6397 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2023-6397?

Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Atp100 Firmware, Zyxel Atp100, Zyxel Atp100W Firmware, Zyxel Atp100W, Zyxel Atp200 Firmware.