CVE-2021-33697

Under certain conditions, SAP BusinessObjects Business Intelligence Platform (SAPUI5), versions - 420, 430, can allow an unauthenticated attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.

Weakness

The web application produces links to untrusted external sites outside of its sphere of control, but it does not properly prevent the external site from modifying security-critical properties of the window.opener object, such as the location property.

Affected Software

Name	Vendor	Start Version	End Version
Businessobjects_business_intelligence	Sap	420 (including)	420 (including)
Businessobjects_business_intelligence	Sap	430 (including)	430 (including)

Potential Mitigations

When creating a link to an external document using the tag with a defined target, for example “_blank” or a named frame, provide the rel attribute with a value “noopener noreferrer”.
If opening the external document in a new window via javascript, then reset the opener by setting it equal to null.
Do not use “_blank” targets. However, this can affect the usability of the application.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-33697
CWE	https://cwe.mitre.org/data/definitions/1022.html

Use of Web Link to Untrusted Target with window.opener Access

Weakness

Affected Software

Potential Mitigations

References