CVE-2021-37122 Use after free in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800

Medium 6.5 Published 27 Oct 2021 Updated 4 Aug 2024

An attacker can cause service abnormality in Huawei CloudEngine switches by sending crafted packets that trigger a use-after-free vulnerability.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-37122?

CVE-2021-37122 is a medium-severity use after free vulnerability in CloudEngine 12800;CloudEngine 5800;CloudEngine 6800;CloudEngine 7800, published on 27 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

There is a use-after-free (UAF) vulnerability in Huawei products. An attacker may craft specific packets to exploit this vulnerability. Successful exploitation may cause the service abnormal. Affected product versions include:CloudEngine 12800 V200R005C10SPC800,V200R019C00SPC800;CloudEngine 5800 V200R005C10SPC800,V200R019C00SPC800;CloudEngine 6800 V200R005C10SPC800,V200R005C20SPC800,V200R019C00SPC800;CloudEngine 7800 V200R005C10SPC800,V200R019C00SPC800.

Weakness: CWE-416

Which versions are affected by CVE-2021-37122?

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-2021-37122?

No fix has been published for CVE-2021-37122 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2021-37122 being exploited?

There is no known exploitation of CVE-2021-37122 in the wild and no public exploit code.

Sources

Also known as GHSA-mp8g-xgjg-4566.