CVE-2021-27610 Auth bypass in SAP NetWeaver AS ABAP and ABAP Platform

Critical 9.0 Published 16 Jun 2021 Updated 3 Aug 2024

Improper authentication in SAP NetWeaver ABAP allows malicious users to obtain illegitimate access to the system due to inconsistent RFC user information formatting.

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-2021-27610?

CVE-2021-27610 is a critical authentication bypass vulnerability in Sap Netweaver Application Server Abap, published on 16 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SAP NetWeaver ABAP Server and ABAP Platform, versions - 700, 701, 702, 731, 740, 750, 751, 752, 753, 754, 755, 804, does not create information about internal and external RFC user in consistent and distinguished format, which could lead to improper authentication and may be exploited by malicious users to obtain illegitimate access to the system.

Weakness: CWE-287

Which versions are affected by CVE-2021-27610?

It affects 2 products.

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

How do I fix CVE-2021-27610?

No fix has been published for CVE-2021-27610 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-27610 being exploited?

There is no known exploitation of CVE-2021-27610 in the wild and no public exploit code.

All Sap Netweaver Application Server Abap vulnerabilities

Sources

Also known as GHSA-8p63-mg7m-pg66.