lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Date: Tue, 11 May 2021 08:36:19 +0200
From: SEC Consult Vulnerability Lab <>
To: <>
Subject: [FD] SEC Consult SA-20210511-0 :: Cross-site Scripting
 Vulnerabilities in REWE GO

SEC Consult Vulnerability Lab Security Advisory < 20210511-0 >
               title: Reflected Cross-site Scripting Vulnerabilities
             product: SIS Informatik - REWE GO
  vulnerable version: 7.5.0/12C
       fixed version: 7.7 SP17
          CVE number: CVE-2021-31537
              impact: Medium
               found: 2021-02-12
                  by: Steffen Robertz (Office Vienna)
                      Florian Lienhart (Office Vienna)
                      SEC Consult Vulnerability Lab

                      An integrated part of SEC Consult, an Atos company
                      Europe | Asia | North America



Vendor description:
"SIS Informatik is your specialist for the conception and implementation
  of tailor-made accounting, business intelligence and corporate
performance management solutions. In addition to technical competence,
business know-how and the willingness to develop optimal, adaptable
software solutions together with our customers are the central
components that make us a strong partner. We develop solutions based on
high-quality technologies from well-known partners such as IBM, Oracle
and Qlik" (translated from German)


Business recommendation:
The vendor provides a patch which should be installed immediately.

SEC Consult recommends to perform a thorough security review of these products
conducted by security professionals to identify and resolve all security

Vulnerability overview/description:
1) Multiple Reflected Cross-site Scripting (XSS) (CVE-2021-31537)
The login website returns unfiltered or unescaped user input. This leads to a
reflected cross-site scripting (XSS) vulnerability.
An attacker can inject arbitrary HTML or JavaScript code into the victim's
web browser. Once the victim clicks on a malicious link, the attacker's code
is executed in the context of the victim's web browser.

Proof of concept:
1) Multiple Reflected Cross-site Scripting (XSS) (CVE-2021-31537)
When opening the following URL the supplied JavaScript code will be executed.
The affected parameters are: "config", "version", "win","db", "pwd", and

No valid parameters need to be supplied to trigger the XSS vulnerability as
seen in following URL:

The following URL is affected as well:
All parameters are affected.

Vulnerable / tested versions:
The following product/firmware version has been tested:
* SIS-REWE GO 7.5.0/12C

Vendor contact timeline:
2021-02-24: Contacting vendor; no reply.
2021-03-11: Contacting vendor again
2021-03-15: Vendor requests more information. SEC Consult offered to provide.
             advisory via encrypted or unencrypted mail.
2021-03-17: Sending advisory via PGP encrypted mail.
2021-03-21: Vendor confirmed the vulnerability and is working on a patch.
2021-04-12: Requested status update.
2021-04-16: Hot fix 7.7 SP16 available in week 16, next release 7.7 SP17 in
             week 18.
2021-05-11: Coordinated release of security advisory.

Contact the vendor in order to install the security patch for release 7.7
or upgrade to release 7.7 SP17. More information has been provided to customers
of the vendor in a newsletter.


Advisory URL:


SEC Consult Vulnerability Lab

SEC Consult, an Atos company
Europe | Asia | North America

About SEC Consult Vulnerability Lab
The SEC Consult Vulnerability Lab is an integrated part of SEC Consult, an
Atos company. It ensures the continued knowledge gain of SEC Consult in the
field of network and application security to stay ahead of the attacker. The
SEC Consult Vulnerability Lab supports high-quality penetration testing and
the evaluation of new offensive and defensive technologies for our customers.
Hence our customers obtain the most current information about vulnerabilities
and valid recommendation about the risk profile of new technologies.

Interested to work with the experts of SEC Consult?
Send us your application

Interested in improving your cyber security with the experts of SEC Consult?
Contact our local offices

Mail: research at sec-consult dot com

EOF Steffen Robertz, Florian Lienhart / @2021

Download attachment "smime.p7s" of type "application/pkcs7-signature" (4311 bytes)

Sent through the Full Disclosure mailing list
Web Archives & RSS:

Powered by blists - more mailing lists