477bcbdcc0
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39 lines
1.1 KiB
Text
Executable file
39 lines
1.1 KiB
Text
Executable file
Affected software
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ircu (upto and including 2.10.12.12)
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snircd (upto and including 1.3.4)
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and many other ircu derivatives
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Vulnerability details
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---------------------
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send_user_mode in s_user.c does not check that the argument after a +r mode
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is present, if it is not than the NULL sentinel may be missed, causing the
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function to iterate over the boundary of the array.
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One possible exploit:
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/mode nickname i i i i i i i i i i i i i i i r r r r s
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This won't work if there's another NULL directly after the first from the
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previous parsed command, if this is the case one can just append more modes
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or send some other junk to the ircd.
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Resolution
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----------
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Upgrade to the very latest version of ircu/snircd.
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Disclosure timeline
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-------------------
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2008-03-15: Vulnerability discovered by QuakeNet and reported to Undernet.
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2008-03-15: Patches released.
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2008-03-17: Patches applied to public servers.
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2008-03-24: Public disclosure.
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--
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Chris Porter (slug on QuakeNet)
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http://www.warp13.co.uk
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# milw0rm.com [2008-03-24]
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