Advisory

On 10.01.2023 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within Kernel / ABAP.

SAP Note 3089413 addresses "[CVE-2023-0014] Capture-replay vulnerability in SAP NetWeaver AS for ABAP and ABAP Platform" to prevent insufficient security function with a hot news risk for exploitation.

A workaround does exist, according to SAP Security Advisory team. It is advisable to implement the correction as project, the team suggests.

Risk specification

SAP NetWeaver ABAP Server and ABAP Platform do not create information about system identity in an unambiguous format. Malicious users may exploit this to obtain illegitimate access to the system.

Solution

By this correction the system identification becomes unique and the system identification will be used and evaluated correctly in trusted-trusting communication scenarios. SAP (credits to Frank Buchholz) released ABAP program ZCHECK_NOTE_3089413 (available for SolMan and FRun) to validate the efficiency for the correction. See https://github.com/SAP-samples/security-services-tools/blob/main/ABAP/solman/zcheck_note_3089413.prog.abap for full details. Circumstances exist that prevent the timely installation of a patch provided by the manufacturer. In such cases, you may consider applying the suggested workaround as a temporary or compensating mitigation: "There is no complete workaround. But the attack surface can be reduced by using encryption (HTTPS, SNC). Give no authorizations for direct table access to table RFCSYSACL,Activate database logging for table RFCSYSACL and check the log periodically.Restrict access to systems, network and network intermediates where trusted/trusting is used. ".

The advisory is valid for

Releated advisories

Disclaimer

SecurityBridge takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability concerning one of the SAP software products – either in the latest or in a former product version follow the guidelines and processes in accordance with the SAP portal page “Report a Security Vulnerability to SAP”.

The advisories found within the SecurityBridge advisory are generated and continuously enriched by our Team at SecurityBridge and affiliated security consultants, partners, customers of the SecurityBridge Platform, SAP support, and advisory groups.

We do not disclose zero-day vulnerabilities unless a security patch has been made available to the public. In such case, the platform only provides details on which version or signature updates are available within the SecurityBridge platform in order to monitor or measure the vulnerability.

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Notifications

Affected system Kernel / ABAP

CVSS 9.0

Component BC-MID-RFC

Patch Day2023-01

Released on2023/01/10

SAP Note 3089413

Workaround Yes

Advisory

Risk specification

Solution

Disclaimer

_{Affected system}
Kernel / ABAP

_CVSS
9.0

_Component
BC-MID-RFC

_{Patch Day}
2023-01

_{Released
on}
2023/01/10

_{SAP Note}
3089413

_Workaround
Yes