CVE-2017-3820 Denial of service in Cisco IOS XE 15.x

Medium 6.5 Published 3 Feb 2017 Updated 5 Aug 2024

An authenticated remote attacker can cause high CPU usage and denial of service on Cisco ASR 1000 routers via SNMP functions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-3820?

CVE-2017-3820 is a medium-severity denial of service vulnerability in Cisco Ios Xe, published on 3 Feb 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in Simple Network Management Protocol (SNMP) functions of Cisco ASR 1000 Series Aggregation Services Routers running Cisco IOS XE Software Release 3.13.6S, 3.16.2S, or 3.17.1S could allow an authenticated, remote attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. More Information: CSCux68796. Known Affected Releases: 15.5(3)S2.1 15.6(1)S1.1. Known Fixed Releases: 15.4(3)S6.1 15.4(3)S6.2 15.5(3)S2.2 15.5(3)S3 15.6(0.22)S0.23 15.6(1)S2 16.2(0.295) 16.3(0.94) 15.5.3S3.

Weakness: CWE-665

Which versions are affected by CVE-2017-3820?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2017-3820?

No fix has been published for CVE-2017-3820 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-2017-3820 being exploited?

There is no known exploitation of CVE-2017-3820 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-4jfr-3638-m4hp.