CVE-2021-27634: Input Validation
First published: Wed Jun 09 2021(Updated: )
SAP NetWeaver AS for ABAP (RFC Gateway), versions - KRNL32NUC - 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 ThCpicDtCreate () causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.
Credit: cna@sap.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| SAP NetWeaver AS for ABAP | =kernel_7.22 | |
| SAP NetWeaver AS for ABAP | =kernel_7.49 | |
| SAP NetWeaver AS for ABAP | =kernel_7.53 | |
| SAP NetWeaver AS for ABAP | =kernel_7.73 | |
| SAP NetWeaver AS for ABAP | =kernel_8.04 | |
| SAP NetWeaver AS for ABAP | =krnl32nuc_7.22 | |
| SAP NetWeaver AS for ABAP | =krnl32nuc_7.22ext | |
| SAP NetWeaver AS for ABAP | =krnl64nuc_7.22 | |
| SAP NetWeaver AS for ABAP | =krnl64nuc_7.22ext | |
| SAP NetWeaver AS for ABAP | =krnl64nuc_7.49 | |
| SAP NetWeaver AS for ABAP | =krnl64uc_7.22 | |
| SAP NetWeaver AS for ABAP | =krnl64uc_7.22ext | |
| SAP NetWeaver AS for ABAP | =krnl64uc_7.49 | |
| SAP NetWeaver AS for ABAP | =krnl64uc_7.53 | |
| SAP NetWeaver AS for ABAP | =krnl64uc_7.73 | |
| SAP NetWeaver AS for ABAP | =krnl64uc_8.04 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-27634?
The severity of CVE-2021-27634 is high.
What is the affected software for CVE-2021-27634?
The affected software for CVE-2021-27634 is SAP NetWeaver AS for ABAP (RFC Gateway) versions KRNL32NUC - 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.
How can an unauthenticated attacker exploit CVE-2021-27634?
An unauthenticated attacker can exploit CVE-2021-27634 by sending a specific request to the system.
Are there any known fixes for CVE-2021-27634?
Yes, please refer to the SAP notes and documentation for the available fixes for CVE-2021-27634.
What is the Common Weakness Enumeration (CWE) ID for CVE-2021-27634?
The CWE ID for CVE-2021-27634 is 20 and 787.
- agent/type
- agent/references
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/weakness
- agent/author
- agent/severity
- agent/description
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/sap
- canonical/sap netweaver as for abap
- version/sap netweaver as for abap/kernel_7.22
- version/sap netweaver as for abap/kernel_7.49
- version/sap netweaver as for abap/kernel_7.53
- version/sap netweaver as for abap/kernel_7.73
- version/sap netweaver as for abap/kernel_8.04
- version/sap netweaver as for abap/krnl32nuc_7.22
- version/sap netweaver as for abap/krnl32nuc_7.22ext
- version/sap netweaver as for abap/krnl64nuc_7.22
- version/sap netweaver as for abap/krnl64nuc_7.22ext
- version/sap netweaver as for abap/krnl64nuc_7.49
- version/sap netweaver as for abap/krnl64uc_7.22
- version/sap netweaver as for abap/krnl64uc_7.22ext
- version/sap netweaver as for abap/krnl64uc_7.49
- version/sap netweaver as for abap/krnl64uc_7.53
- version/sap netweaver as for abap/krnl64uc_7.73
- version/sap netweaver as for abap/krnl64uc_8.04