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AUSCERT External Security Bulletin Redistribution
ESB-2020.2228
CVE-2004-1653 SSH port forwarding exposes unprotected internal services
29 June 2020
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AusCERT Security Bulletin Summary
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Product: OpenSSH
Publisher: Fortiguard
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Unknown/Unspecified
Access Privileged Data -- Unknown/Unspecified
Resolution: Patch/Upgrade
CVE Names: CVE-2004-1653
Original Bulletin:
https://fortiguard.com/psirt/FG-IR-19-292
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CVE-2004-1653 SSH port forwarding exposes unprotected internal services
IR Number : FG-IR-19-292
Date : Jun 26, 2020
Risk : 3/5
Impact : Information Disclosure, Privilege Escalation
CVE ID : CVE-2004-1653
CVE ID : CVE-2004-1653
CVE ID : CVE-2004-1653
Summary
An improper access control vulnerability in the admin SSH console of multiple
products may allow an authenticated user to access internal only system
services via using SSH local port forwarding.
A successful attack needs an authenticated admin SSH user to set up a port
bounce to product internal only services via SSH local port forwarding;
potential consequences are information disclosure and/or privilege escalation.
Impact
Information Disclosure, Privilege Escalation
Affected Products
FortiOS is not impacted.
FortiSwitch is not impacted.
FortiAnalyzer 6.2.0 to 6.2.3, 6.0.8 and below
FortiManager 6.2.0 to 6.2.3, 6.0.8 and below
FortiAP-S/W2 6.2.3 and below
FortiAP-U 6.0.1 and below
Solutions
FortiAnalyzer: upgrade to 6.0.9 or 6.2.4 or above
FortiManager: upgrade to 6.0.9 or 6.2.4 or above
FortiAP-S/W2: upgrade to 6.2.4 or above
FortiAP-U: upgrade to 6.0.2 or above
Workarounds:
Disable admin SSH console, or set trusted hosts to restrict admin SSH console
access to trusted users, to prevent scenarios where an attacker who acquired
valid user accounts via phishing / social engineering uses those to perform
this attack.
Acknowledgement
Fortinet is pleased to thank Renee Trisberg from SpectX ( https://
www.spectx.com/ ) for reporting this vulnerability under FortiAnalyzer through
responsible disclosure.
References
o OpenSSH CVE-2004-1653
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