CVE-2024-38270: gs1900-8 — Fix

Description

An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-331 CWE-331

Affected Products

Vendor	Product	Versions
zyxel	gs1900-48hpv2_firmware	< 2.80\(abtq.1\)c0
zyxel	gs1900-48hpv2	All
zyxel	gs1900-48_firmware	< 2.80\(aahn.1\)c0
zyxel	gs1900-48	All
zyxel	gs1900-24hpv2_firmware	< 2.80\(abtp.1\)c0
zyxel	gs1900-24hpv2	All
zyxel	gs1900-24ep_firmware	< 2.80\(abto.1\)c0
zyxel	gs1900-24ep	All
zyxel	gs1900-24e_firmware	< 2.80\(aahk.1\)c0
zyxel	gs1900-24e	All
zyxel	gs1900-24_firmware	< 2.80\(aahl.1\)c0
zyxel	gs1900-24	All
zyxel	gs1900-16_firmware	< 2.80\(aahj.1\)c0
zyxel	gs1900-16	All
zyxel	gs1900-10hp_firmware	< 2.80\(aazi.1\)c0
zyxel	gs1900-10hp	All
zyxel	gs1900-8hp_firmware	< 2.80\(aahi.1\)c0
zyxel	gs1900-8hp	All
zyxel	gs1900-8_firmware	< 2.80\(aahh.1\)c0
zyxel	gs1900-8	All

References

Advisories & Patches

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-insufficient-entropy-vulnerability-for-web-authentication-tokens-generation-in-gs1900-series-switches-09-10-2024

Frequently Asked Questions

What is CVE-2024-38270? +

An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-38270? +

CVE-2024-38270 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-38270? +

CVE-2024-38270 affects products from zyxel, specifically: gs1900-10hp, gs1900-10hp_firmware, gs1900-16, gs1900-16_firmware, gs1900-24, gs1900-24_firmware, gs1900-24e, gs1900-24e_firmware, gs1900-24ep, gs1900-24ep_firmware, gs1900-24hpv2, gs1900-24hpv2_firmware, gs1900-48, gs1900-48_firmware, gs1900-48hpv2, gs1900-48hpv2_firmware, gs1900-8, gs1900-8_firmware, gs1900-8hp, gs1900-8hp_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-38270? +

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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