CVE-2021-40008 Denial of service in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800

High 7.5 Published 13 Dec 2021 Updated 4 Aug 2024

Attackers can cause memory exhaustion and denial of service on Huawei CloudEngine switches by sending crafted binary messages.

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-2021-40008?

CVE-2021-40008 is a high-severity denial of service vulnerability in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800, published on 13 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

There is a memory leak vulnerability in CloudEngine 12800 V200R019C00SPC800, CloudEngine 5800 V200R019C00SPC800, CloudEngine 6800 V200R019C00SPC800 and CloudEngine 7800 V200R019C00SPC800. The software does not sufficiently track and release allocated memory while parse a series of crafted binary messages, which could consume remaining memory. Successful exploit could cause memory exhaust.

Weakness: CWE-772

Which versions are affected by CVE-2021-40008?

It affects 4 products.

Products include Huawei Cloudengine 12800 Firmware, Huawei Cloudengine 5800 Firmware, Huawei Cloudengine 6800 Firmware, Huawei Cloudengine 7800 Firmware.

How do I fix CVE-2021-40008?

No fix has been published for CVE-2021-40008 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-2021-40008 being exploited?

There is no known exploitation of CVE-2021-40008 in the wild and no public exploit code.

Sources

Also known as GHSA-2c7w-qmwm-xgjp.