Bug 750636 - (CVE-2011-4092) CVE-2011-4092 obby: does not validate SSL connections which can lead to MITM attacks
CVE-2011-4092 obby: does not validate SSL connections which can lead to MITM ...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 750642 750641
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Reported: 2011-11-01 16:33 EDT by Vincent Danen
Modified: 2016-09-19 22:48 EDT (History)
1 user (show)

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Doc Type: Bug Fix
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Description Vincent Danen 2011-11-01 16:33:38 EDT
Vasiliy Kulikov reported [1] that obby does not check a server's SSL certificate when connecting.  It also sends the password in plaintext form over the SSL channel.  An attacker able to perform a MITM attack on the connection could easily do so without discovery due to obby not checking the server's SSL certificate.

Note: if the client is Gobby, the reconnection attempt will require user interaction.

Upstream has indicated [2] that it is not worth the effort to implement SSL certificate checking in obby as it is deprecated by libinfinity, which is used by the development version of Gobby, so there is currently no fix for obby.

[1] http://www.openwall.com/lists/oss-security/2011/10/30/3
[2] http://www.openwall.com/lists/oss-security/2011/10/30/5
Comment 1 Vincent Danen 2011-11-01 16:51:35 EDT
Created obby tracking bugs for this issue

Affects: fedora-all [bug 750641]
Affects: epel-all [bug 750642]

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