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Category:   OS (UNIX)  >   Solaris Vendors:   Sun
Solaris Secure Shell CBC Mode Error Handling May Let Certain Remote Users Obtain Plain Text in Certain Cases
SecurityTracker Alert ID:  1021382
SecurityTracker URL:  http://securitytracker.com/id/1021382
CVE Reference:   CVE-2008-5161   (Links to External Site)
Date:  Dec 11 2008
Impact:   Disclosure of user information
Vendor Confirmed:  Yes  
Version(s): 9, 10, OpenSolaris
Description:   A vulnerability was reported in Solaris Secure Shell (SSH). A remote user with control of the network can obtain portions of plain text in certain cases.

A remote user with control of the network between the client and the server can inject connection errors and monitor the SSH error handling response to recover up to 32 bits of plain text from an SSH-protected connection.

The attack process will terminate the SSH connection.

CBC mode connections are affected.

CTR mode connections are not affected.

Martin Albrecht, Kenny Paterson and Gaven Watson from the Information Security Group at Royal Holloway, University of London reported this vulnerability via the Centre for the Protection of National Infrastructure (CPNI).

The original advisory is available at:

http://www.cpni.gov.uk/Docs/Vulnerability_Advisory_SSH.txt

Impact:   A remote user with control of the network can obtain portions of plain text in certain cases.
Solution:   No solution was available at the time of this entry.

As a workaround, Sun indicates that you can disable CBC mode ciphers, as described in their advisory.

The vendor's advisory is available at:

http://sunsolve.sun.com/search/document.do?assetkey=1-66-247186-1

Vendor URL:  sunsolve.sun.com/search/document.do?assetkey=1-66-247186-1 (Links to External Site)
Cause:   Randomization error

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 3 2016 (HP Issues Fix for HPE BladeSystem) Solaris Secure Shell CBC Mode Error Handling May Let Certain Remote Users Obtain Plain Text in Certain Cases
HP has issued a fix for HPE BladeSystem.



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