Security Advisories

The Onapsis Research Labs delivers regular SAP^® and Oracle^® vulnerability research to our ecosystem of customers, partners and the information security industry.

Onapsis security advisories enable customers to better understand the security and business implications of discovered SAP and Oracle security issues. This enables organizations to prioritize patches, updates and their remediation strategies to ensure continuity of the business. Onapsis security advisories, together with vendor patches and security notes, are available for download to provide vendors and end-users with the necessary information to mitigate advanced threats to mission-critical applications running on SAP and Oracle.

Critical 03/19/2021 SAP JAVA

SAP Java OS Remote Code Execution

Impact On Business

A malicious authenticated attacker could abuse some particular services exposed by the SAP JAVA Netweaver allowing them to execute commands in the underlying operating system.

Affected Components Description

SAP NetWeaver JAVA is a foundational layer which is used by several SAP products, such as:

SAP Enterprise portal
SAP Solution Manager
SAP PI/PO
SAP Landscape Manager
among others.

Due to the vulnerable components residing in this "foundational layer", all products running on top of SAP JAVA NetWeaver will be affected by this vulnerability.

Affected components:

SAP Netweaver JAVA version 7.30 - 7.50

(Check SAP Note #2979062 for detailed information on affected releases)

Vulnerability Details

A particular part (UDDI SERVER) of the SAP JAVA Netweaver layer, exposes a functionality which allows authenticated attackers to upload resources. In particular, at least the NWA_SUPERADMIN privileges are needed to be able to use the upload process. Due to lack of controls, these files are not checked and therefore any type of files could be uploaded, resulting in the possibility of executing commands in the underlying OS.

Solution

SAP has released SAP Note #2979062 which provides patched versions of the affected components.

The patches can be downloaded from: https://service.sap.com/sap/support/notes/2979062.

Onapsis strongly recommends SAP customers to download the related security fixes and apply them to the affected components in order to reduce business risks.

Report Timeline

05/10/2020: Onapsis sends details to SAP
05/10/2020: SAP provides internal ID’s.
12/10/2020: SAP confirms vulnerability and assigns CVSSv3 score of 9.1 (NLHN|C|HHH)
10/11/2020: SAP releases patch.

References

Onapsis Blog Post: https://onapsis.com/blog/sap-security-notes-november-2020
CVE Mitre: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26820
Vendor Patch: https://launchpad.support.sap.com/#/notes/2979062

ADVISORY INFORMATION

Public Release Date: 03/19/2021
Security Advisory ID: ONAPSIS-2021-0004
Vulnerability Submission ID: 847
Researcher(s): Pablo Artuso

VULNERABILITY INFORMATION

Vendor: SAP
Vulnerability Class: |LS|CWE-434|RS| Unrestricted Upload of File with Dangerous Type
CVSS v3 score: 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)
Severity: Critical
CVE: CVE-2020-26820
Vendor patch Information: SAP Security Note #2979062

ABOUT OUR RESEARCH LABS

Onapsis Research Labs provides the industry analysis of key security issues that impact mission-critical systems and applications.

Delivering frequent and timely security and compliance advisories with associated risk levels, Onapsis Research Labs combine in-depth knowledge and experience to deliver technical and business-context with sound security judgment to the broader information security community.

Find all reported vulnerabilities at https://github.com/Onapsis/vulnerability_advisories

LICENSE

This advisory is licensed under a Creative Commons 4.0 BY-ND International License