CVE-2021-27628 Memory corruption in SAP NetWeaver ABAP Server and ABAP Platform (Dispatcher)

High 7.5 Published 9 Jun 2021 Updated 3 Aug 2024

An unauthenticated attacker can crash the SAP NetWeaver ABAP Server Dispatcher via a crafted packet, 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-2021-27628?

CVE-2021-27628 is a high-severity memory corruption vulnerability in SAP NetWeaver ABAP Server and ABAP Platform (Dispatcher), published on 9 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 (Dispatcher), versions - KRNL32NUC - 7.22,7.22EXT, KRNL32UC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.22,7.22EXT,7.49,7.53,7.73, KERNEL - 7.22,8.04,7.49,7.53,7.73,7.77,7.81,7.82,7.83, allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network which will trigger an internal error in the system due to improper input validation in method DpRTmPrepareReq() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.

Weakness: CWE-787

Which versions are affected by CVE-2021-27628?

It affects 1 product.

Products include Sap Netweaver as Abap.

How do I fix CVE-2021-27628?

No fix has been published for CVE-2021-27628 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-27628 being exploited?

There is no known exploitation of CVE-2021-27628 in the wild and no public exploit code.

Sources

Also known as GHSA-5f46-4729-jprm.