CVE-2024-42057

HIGH
Published Sep 3, 2024 Modified Dec 13, 2024 CWE-78

Description

A command injection vulnerability in the IPSec VPN feature 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 unauthenticated attacker to execute some OS commands on an affected device by sending a crafted username to the vulnerable device. Note that this attack could be successful only if the device was configured in User-Based-PSK authentication mode and a valid user with a long username exceeding 28 characters exists.

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CVSS v3.1 Score

8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-78 OS Command Injection

Affected Products

Vendor Product
zyxel zld
zyxel atp100
zyxel atp100w
zyxel atp200
zyxel atp500
zyxel atp700
zyxel atp800
zyxel zld
zyxel usg_flex_100
zyxel usg_flex_100ax
zyxel usg_flex_100w
zyxel usg_flex_200
zyxel usg_flex_50
zyxel usg_flex_500
zyxel usg_flex_700
zyxel zld
zyxel usg_flex_50w
zyxel zld
zyxel usg_20w-vpn

References

Frequently Asked Questions

What is CVE-2024-42057? +
A command injection vulnerability in the IPSec VPN feature 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 unauthenticated attacker to execute some OS commands on an affected device by sending a crafted username to the vulnerable device. Note that this attack could be successful only if the device was configured in User-Based-PSK authentication mode and a valid user with a long username exceeding 28 characters exists. It has a CVSS v3.1 base score of 8.1 (HIGH).
How severe is CVE-2024-42057? +
CVE-2024-42057 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-42057? +
CVE-2024-42057 affects products from zyxel, specifically: atp100, atp100w, atp200, atp500, atp700, atp800, usg_20w-vpn, usg_flex_100, usg_flex_100ax, usg_flex_100w, usg_flex_200, usg_flex_50, usg_flex_500, usg_flex_50w, usg_flex_700, zld. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-42057? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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