#VU50452 Input validation error in SAP HANA - CVE-2021-21474

Vulnerability identifier: #VU50452

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-21474

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SAP HANA
Server applications / Database software

Vendor: SAP

Description

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to improper input validation in the SAML assertion signature MD5 digest algorithm. A remote user can pass specially crafted input to the application and bypass implemented security restrictions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SAP HANA: 1.00 - 2.00

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External links
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=568460543
https://launchpad.support.sap.com/#/notes/2992154

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.