CVE-2021-40495 Denial of service in SAP NetWeaver AS ABAP and ABAP Platform

Medium 5.3 Published 12 Oct 2021 Updated 4 Aug 2024

An unauthorized attacker can degrade performance of SAP NetWeaver Application Server ABAP via a public service, causing 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-2021-40495?

CVE-2021-40495 is a medium-severity denial of service vulnerability in Sap Netweaver Application Server Abap, published on 12 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

There are multiple Denial-of Service vulnerabilities in SAP NetWeaver Application Server for ABAP and ABAP Platform - versions 740, 750, 751, 752, 753, 754, 755. An unauthorized attacker can use the public SICF service /sap/public/bc/abap to reduce the performance of SAP NetWeaver Application Server ABAP and ABAP Platform.

Which versions are affected by CVE-2021-40495?

It affects 2 products.

Products include Sap Netweaver Abap, Sap Netweaver Application Server Abap.

How do I fix CVE-2021-40495?

No fix has been published for CVE-2021-40495 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-2021-40495 being exploited?

There is no known exploitation of CVE-2021-40495 in the wild and no public exploit code.

All Sap Netweaver Application Server Abap vulnerabilities

Sources

Also known as GHSA-c7v9-3364-rhjg.