CVE-2021-22359 Denial of service in S5700;S6700

High 7.5 Published 27 May 2021 Updated 3 Aug 2024

An attacker can cause service disruption on Huawei S5700 and S6700 switches by sending specific messages due to insufficient input validation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-22359?

CVE-2021-22359 is a high-severity denial of service vulnerability in S5700;S6700, published on 27 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

There is a denial of service vulnerability in the verisions V200R005C00SPC500 of S5700 and V200R005C00SPC500 of S6700. An attacker could exploit this vulnerability by sending specific message to a targeted device. Due to insufficient input validation, successful exploit can cause the service abnormal.

Weakness: CWE-20

Which versions are affected by CVE-2021-22359?

It affects 2 products.

Products include Huawei S5700 Firmware, Huawei S6700 Firmware.

How do I fix CVE-2021-22359?

No fix has been published for CVE-2021-22359 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-22359 being exploited?

There is no known exploitation of CVE-2021-22359 in the wild and no public exploit code.

Sources

Also known as GHSA-qmm3-r49c-cwh6.