FortiOS SSL VPN: Access Confidential Data -- Existing Account

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.0320
             FortiOS SSL VPN user credential plaintext storage
                              29 January 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           FortiOS SSL VPN
Publisher:         Fortiguard
Operating System:  Network Appliance
Impact/Access:     Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-17655  

Original Bulletin: 
   https://fortiguard.com/psirt/FG-IR-19-217

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FortiOS SSL VPN user credential plaintext storage

IR Number : FG-IR-19-217

Date      : Jan 27, 2020

Risk      : 3/5

Impact    : Information Disclosure

CVE ID    : CVE-2019-17655

CVE ID    : CVE-2019-17655

Summary

A cleartext storage in a file or on disk (CWE-313) vulnerability in FortiOS SSL
VPN may allow an attacker to retrieve a logged-in SSL VPN user's credentials
should that attacker be able to read the session file stored on the targeted
device's system.


To successfully exploit this weakness, another unrelated weakness (eg: a system
file leaking vulnerability) would therefore need to be exploited first.

Impact

Information Disclosure

Affected Products

FortiOS all versions below 6.2.3

Solutions

Upgrade to FortiOS 6.2.3

References

  o https://blog.orange.tw/2019/08/
    attacking-ssl-vpn-part-2-breaking-the-fortigate-ssl-vpn.html

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