CVE intelligence and bounded remediation

CVE-2017-16689 — Sap Sap Kernel security vulnerability

High CVSS 8.8

A Trusted RFC connection in SAP KERNEL 32NUC, SAP KERNEL 32Unicode, SAP KERNEL 64NUC, SAP KERNEL 64Unicode 7.21, 7.21EXT, 7.22, 7.22EXT; SAP KERNEL from 7.21 to 7.22, 7.45, 7.49, can be established to a different client or a different user on the same system, although no explicit Trusted/Trusting Relation to the same system has been defined.

Severity
High
CVSS
8.8 (3.0)
Published
2017-12-12
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-287

Affected products

  • sap / sap_kernel / 7.21
  • sap / sap_kernel / 7.21ext
  • sap / sap_kernel / 7.22
  • sap / sap_kernel / 7.22ext
  • sap / sap_kernel / 7.45
  • sap / sap_kernel / 7.49

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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