CVE-2021-21446 Denial of service in SAP NetWeaver AS ABAP

High 7.5 Published 12 Jan 2021 Updated 3 Aug 2024

An unauthenticated attacker can crash or flood SAP NetWeaver AS ABAP services, causing denial of service for legitimate users.

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-2021-21446?

CVE-2021-21446 is a high-severity denial of service vulnerability in Sap Netweaver Application Server Abap, published on 12 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SAP NetWeaver AS ABAP, versions 740, 750, 751, 752, 753, 754, 755, allows an unauthenticated attacker to prevent legitimate users from accessing a service, either by crashing or flooding the service, this has a high impact on the availability of the service.

Which versions are affected by CVE-2021-21446?

It affects 1 product.

Products include Sap Netweaver Application Server Abap.

How do I fix CVE-2021-21446?

No fix has been published for CVE-2021-21446 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-2021-21446 being exploited?

There is no known exploitation of CVE-2021-21446 in the wild and no public exploit code.

All Sap Netweaver Application Server Abap vulnerabilities

Sources

Also known as GHSA-jv2p-v76x-4c37.