CVE-2021-1350 Cisco Umbrella Dashboard Packet Flood Vulnerability

Medium 5.3 Published 20 Jan 2021 Updated 12 Nov 2024

Unauthenticated remote attackers can degrade Cisco Umbrella web UI performance by sending high-rate crafted HTTPS packets due to insufficient rate limiting.

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-2021-1350?

CVE-2021-1350 is a medium-severity denial of service vulnerability in Cisco Umbrella Insights Virtual Appliance, published on 20 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the web UI of Cisco Umbrella could allow an unauthenticated, remote attacker to negatively affect the performance of this service. The vulnerability exists due to insufficient rate limiting controls in the web UI. An attacker could exploit this vulnerability by sending crafted HTTPS packets at a high and sustained rate. A successful exploit could allow the attacker to negatively affect the performance of the web UI. Cisco has addressed this vulnerability.

Weakness: CWE-770

Which versions are affected by CVE-2021-1350?

It affects 1 product.

Products include Cisco Umbrella.

How do I fix CVE-2021-1350?

No fix has been published for CVE-2021-1350 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-2021-1350 being exploited?

There is no known exploitation of CVE-2021-1350 in the wild and no public exploit code.

Sources

Also known as GHSA-28r8-9g34-2x25.