CVE-2021-1273 Cisco SD-WAN Denial of Service Vulnerabilities

High 8.6 Published 20 Jan 2021 Updated 12 Nov 2024

Unauthenticated remote attackers can execute denial of service attacks against Cisco SD-WAN devices, disrupting network availability.

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-2021-1273?

CVE-2021-1273 is a high-severity denial of service vulnerability in Cisco Catalyst Sd-Wan Manager, published on 20 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-119

Which versions are affected by CVE-2021-1273?

It affects 5 products.

Products include Cisco Catalyst Sd-Wan Manager, Cisco Ios Xe Sd-Wan, Cisco Sd-Wan Firmware, Cisco Sd-Wan Vbond Orchestrator, Cisco Sd-Wan Vsmart Controller Firmware.

How do I fix CVE-2021-1273?

No fix has been published for CVE-2021-1273 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-2021-1273 being exploited?

There is no known exploitation of CVE-2021-1273 in the wild and no public exploit code.

All Cisco Catalyst Sd-Wan Manager vulnerabilities

Sources

Also known as GHSA-vp27-rfq3-8m9q.