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Date: Mon, 14 Jun 2021 13:31:08 -0300
From: Onapsis Research via Fulldisclosure <fulldisclosure@...lists.org>
To: fulldisclosure@...lists.org
Subject: [FD] Onapsis Security Advisory 2021-0007: Exposure of Sensitive
 Information to an Unauthorized Actor

# Onapsis Security Advisory 2021-0007: Exposure of Sensitive
Information to an Unauthorized Actor


## Impact on Business

An attacker can generate download-links sequentially targeting "impex"
directory
files. As a consequence, they will be able download most of these files,
potentially disclosing critical Hybris information such as credentials.


## Advisory Information

- Public Release Date: 06/14/2021
- Security Advisory ID: ONAPSIS-2021-0007
- Researcher: Gaston Traberg


## Vulnerability Information

- Vendor: SAP
- Affected Components:
  - SAP Hybris eCommerce 1808
  - SAP Hybris eCommerce 1811
  - SAP Hybris eCommerce 1905
  - SAP Hybris eCommerce 2005

- Vulnerability Class: [CWE-200] Exposure of Sensitive Information to
an Unauthorized Actor
- CVSS v3 score: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
- Risk Level: High
- Assigned CVE: CVE-2020-26809
- Vendor patch Information: SAP Security NOTE 2975189


## Affected Components Description

SAP Hybris is an ecommerce platform that is used to address a family
of products involving
Customer Experience and Management. The "medias" module is responsible
for providing users a
secure way to upload and access files in the system.


## Vulnerability Details

When a file is uploaded into Hybris using the "medias" module, part of
the destination path is
generated using user-provided information and some other static
context data kept by Hybris.
The user-controlled part is the only one that changes among uploaded
files and therefore it's
possible to sequentially craft download-links (bruteforcing) with the
goal of accessing prior
uploaded files. Among these files it is possible to find critical ones such as
those inside the 'impex' directory.


## Solution

SAP has released SAP Note 2975189 which provide patched versions of the
affected components.

The patches can be downloaded
fromhttps://service.sap.com/sap/support/notes/2975189.

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

- 08-25-2020: Onapsis provides details to SAP
- 08-25-2020: SAP provides SR ID
- 09-09-2020: SAP provides update: "Vulnerability is in progress"
- 10-12-2020: SAP provides update: "Fix in progress"
- 02-09-2021: SAP releases SAP Note fixing the issue. Vulnerability is
now closed


## References

* Onapsis blogpost: https://onapsis.com/blog/sap-security-notes-november-2020
* CVE Mitre: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26809
* Vendor Patch: https://launchpad.support.sap.com/#/notes/2975189


## About Onapsis Research Labs

Onapsis Research Labs provides the industry analysis of key security
issues that impact business-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


## About Onapsis, Inc.

Onapsis protects the mission-critical applications that run the global economy,
from the core to the cloud. The Onapsis Platform uniquely delivers actionable
insight, secure change, automated governance and continuous monitoring
for critical
systems—ERP, CRM, PLM, HCM, SCM and BI applications—from leading
vendors such as SAP,
Oracle, Salesforce and others, while keeping them protected and compliant.

For more information, connect with us on Twitter or LinkedIn, or visit
us athttps://www.onapsis.com.

## License
This advisory is licensed under a [Creative Commons 4.0 BY-ND
International License](https://creativecommons.org/licenses/by-nd/4.0/legalcode)

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