CVE-2023-6397

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.13%
Vendor Advisory zyxel.com
Affected: Zyxel ATP series firmware
Affected: Zyxel USG FLEX series firmware
Published at:
Updated at:

References

Link Tags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-6397?
CVE-2023-6397 has been scored as a medium severity vulnerability.
How to fix CVE-2023-6397?
To fix CVE-2023-6397, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-6397 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6397 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6397?
CVE-2023-6397 affects Zyxel ATP series firmware, Zyxel USG FLEX series firmware.
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