CVE-2021-21724 Denial of service in ZXR10 8900E
A local attacker can cause a memory leak and service disruption by repeatedly attenuating the optical signal on ZTE ZXR10 8900E devices.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21724?
CVE-2021-21724 is a medium-severity denial of service vulnerability in ZXR10 8900E, published on 26 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.
Weakness: CWE-401
Which versions are affected by CVE-2021-21724?
It affects 1 product.
Products include Zte Zxr10 8900e Firmware.
How do I fix CVE-2021-21724?
No fix has been published for CVE-2021-21724 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-2021-21724 being exploited?
There is no known exploitation of CVE-2021-21724 in the wild and no public exploit code.
Sources
Also known as GHSA-fqjw-rgv6-j77q.