PT-2021-17568 · Sap · Sap Netweaver As Abap

Published 2021-06-09 · Updated 2022-10-31 · CVE-2021-27633

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions SAP NetWeaver AS for ABAP (RFC Gateway) versions 7.22 through 7.83

Description The issue allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network, triggering an internal error in the system due to improper input validation in the ThCPIC() method. This causes the system to crash and renders it unavailable. In this attack, no data in the system can be viewed or modified.

Recommendations For SAP NetWeaver AS for ABAP (RFC Gateway) versions 7.22 through 7.83, consider disabling the ThCPIC() method as a temporary workaround until a patch is available. Restrict access to the RFC Gateway to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-27633

Affected Products

Sap Netweaver As Abap

References · 5

• https://launchpad.support.sap.com/#/notes/3020209 · Vendor Advisory
• https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27633 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27633 · Security Note
• https://t.me/cvenotify/22961 · Telegram Post