CVE-2021-3125 Denial of service in n/a
Attackers can cause excessive network traffic and routing loops in TP-Link routers using IPv6, leading to denial of service.
- 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-2021-3125?
CVE-2021-3125 is a high-severity denial of service vulnerability in n/a, published on 12 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In TP-Link TL-XDR3230 < 1.0.12, TL-XDR1850 < 1.0.9, TL-XDR1860 < 1.0.14, TL-XDR3250 < 1.0.2, TL-XDR6060 Turbo < 1.1.8, TL-XDR5430 < 1.0.11, and possibly others, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set.
Weakness: CWE-834
Which versions are affected by CVE-2021-3125?
It affects 6 products.
Products include Tp-Link Tl-Xdr1850 Firmware, Tp-Link Tl-Xdr1860 Firmware, Tp-Link Tl-Xdr3230 Firmware, Tp-Link Tl-Xdr3250 Firmware, Tp-Link Tl-Xdr5430 Firmware, Tp-Link Tl-Xdr6060 Firmware.
How do I fix CVE-2021-3125?
No fix has been published for CVE-2021-3125 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-2021-3125 being exploited?
There is no known exploitation of CVE-2021-3125 in the wild and no public exploit code.
Sources
Also known as GHSA-w422-w3vf-f63f.