Advisory

A note with CVSS 4.2 for component HAN-DB-SEC was released by SAP on 08.12.2020. The correction/advisory 2978768 was described with "[CVE-2020-26834 ] Improper authentication in SAP HANA database" and affects the system type HANA Platform.

A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance.

The vulnerability addressed is missing authentication check within HANA Platform.

Risk specification

The SAP HANA database does not correctly validate the user name when performing SAML bearer token-based user authentication, allowing to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated user name for whom the SAML bearer token was issued.

Solution

The SAP HANA database now properly performs the validation of the SAML token during the authentication. Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "Disable the SAML authentication only for the affected users.".

Affected System

SAP HANA is a high-performance in-memory database and the basis for a so called "Real-Time Data Platform". SAP HANA allows online transaction processing (OLTP) and online analytical processing (OLAP) on one system. SAP HANA Extended Application Services (aka SAP HANA XS) is a key aspect of SAP HANA as a platform.

Additonal resources

SAP HANA Security Guide for SAP HANA Platform

The advisory is valid for

HDB 1.00 ²
HDB 2.00 ¹²

Releated advisories

Disclaimer

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Notifications

Affected system HANA Platform

CVSS 4.2

Component HAN-DB-SEC

Patch Day2020-12

Released on2020/12/08

SAP Note 2978768

Workaround Yes

Advisory

Risk specification

Solution

Affected System

Additonal resources

Disclaimer

_{Affected system}
HANA Platform

_CVSS
4.2

_Component
HAN-DB-SEC

_{Patch Day}
2020-12

_{Released
on}
2020/12/08

_{SAP Note}
2978768

_Workaround
Yes