Cyber Resilience

CVE-2021-27634

Medium

Published: 09 June 2021

Published
09 June 2021
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0021 43.7th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-27634 is a medium-severity Out-of-bounds Write (CWE-787) vulnerability in Sap Netweaver Abap. Its CVSS base score is 5.9 (Medium).

Operationally, ranked at the 43.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

sap
netweaver abap
kernel_7.22, kernel_7.49, kernel_7.53, kernel_7.73, kernel_8.04

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References