CVE-2021-27607 Null dereference 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 by sending a specially crafted packet, causing a 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-2021-27607?

CVE-2021-27607 is a high-severity 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 ThSncIn() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.

Weakness: CWE-476

Which versions are affected by CVE-2021-27607?

It affects 1 product.

Products include Sap Netweaver as Abap.

How do I fix CVE-2021-27607?

No fix has been published for CVE-2021-27607 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-27607 being exploited?

There is no known exploitation of CVE-2021-27607 in the wild and no public exploit code.

Sources

Also known as GHSA-8442-3jhx-m6j3.