CVE-2021-25811 Denial of service in n/a
An attacker can cause a denial of service on MERCUSYS Mercury X18G routers by sending a crafted value to the listen_http_lan parameter, requiring manual recovery.
- 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-2021-25811?
CVE-2021-25811 is a high-severity denial of service vulnerability in n/a, published on 29 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MERCUSYS Mercury X18G 1.0.5 devices allow Denial of service via a crafted value to the POST listen_http_lan parameter. Upon subsequent device restarts after this vulnerability is exploted the device will not be able to access the webserver unless the listen_http_lan parameter to uhttpd.json is manually fixed.
Which versions are affected by CVE-2021-25811?
It affects 1 product.
Products include Mercusys Mercury X18g Firmware.
How do I fix CVE-2021-25811?
No fix has been published for CVE-2021-25811 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-2021-25811 being exploited?
There is no known exploitation of CVE-2021-25811 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-575x-p9rr-ph24.