MailDepot 2032 SP2 Session Expiration

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Advisory ID: SYSS-2019-049  
Product: MailDepot  
Manufacturer: REDDOXX GmbH  
Affected Version(s): 2032 SP2 (2.2.1242)  
Tested Version(s): 2032 SP2 (2.2.1242)  
Vulnerability Type: Insufficient Session Expiration (CWE-613)  
Risk Level: Low  
Solution Status: Fixed  
Manufacturer Notification: 2019-11-19  
Solution Date: 2020-06-09  
Public Disclosure: 2020-09-29  
CVE Reference: CVE-2019-19199  
Authors of Advisory: Micha Borrmann (SySS GmbH)  
  
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Overview:  
  
REDDOXX MailDepot is an e-mail archiving solution with many features  
and an optional web browser user interface.  
  
The manufacturer describes the product as follows (see [1]):  
  
"The email archiving solution works independently from the type of mail  
server, supports any type of storage and can therefore be easily  
integrated into any existing infrastructure."  
  
Due to the improper server-side invalidation of authentication tokens  
when using the logout function, authentication tokens can still be  
used.  
  
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Vulnerability Details:  
  
After using the logout function, the assigned authentication token for  
the REST web service can still be used for many hours, because it  
is only invalidated on the client, but not on the server side.  
  
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Proof of Concept (PoC):  
  
Storing and reusing the assigned authentication ID can easily be  
demonstrated with a modifying web proxy.  
  
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Solution:  
  
Install the provided security update.  
  
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Disclosure Timeline:  
  
2019-11-18: Detection of the vulnerability  
2019-11-19: Vulnerability reported to manufacturer  
2019-11-20: Manufacturer confirms vulnerability  
2019-11-21: CVE number assigned  
2020-06-09: Update was released from the vendor [2]  
2020-09-29: Public release of the security advisory  
  
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References:  
  
[1] REDDOXX MailDepot Product Website  
https://www.reddoxx.com/en/products/archiving/  
[2] REDDOXX Release Information  
https://www.reddoxx.com/reddoxx-appliance-2033-verfuegbar/   
[3] SySS Security Advisory SYSS-2019-049  
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-049.txt  
[4] SySS Responsible Disclosure Policy  
https://www.syss.de/en/responsible-disclosure-policy/  
  
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Credits:  
  
This security vulnerability was found by Micha Borrmann of SySS GmbH.  
  
E-Mail: micha.borrmann (at) syss.de  
Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Micha_Borrmann.asc  
Key Fingerprint: 38BD 7A9C 3EA9 39C5 33F9 94D0 CFC2 D5B0 8EE0 CBB9  
  
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Disclaimer:  
  
The information provided in this security advisory is provided "as is"  
and without warranty of any kind. Details of this security advisory  
may be updated in order to provide as accurate information as  
possible. The latest version of this security advisory is available on  
the SySS website.  
  
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Copyright:  
  
Creative Commons - Attribution (by) - Version 3.0  
URL: http://creativecommons.org/licenses/by/3.0/deed.en  
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