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Sybase privilege escalation
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Secunia Advisory:
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SA7620
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Release Date:
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2002-11-28
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Popularity:
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5,902 views
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Critical:
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Moderately critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| Software: | Sybase Adaptive Server Enterprise 12.x
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Description:
Sybase Adaptive Server 12 and 12.5 has three different flaws allowing non-privileged users to gain privileges.
By passing an argument of more than 45 characters to xp_freedll a buffer overflow is caused.
The DBCC CHECKVERIFY buffer overflow:
declare @test varchar(16384)
select @test = replicate('A', 16384)
DBCC CHECKVERIFY(@test)
go
The DROP DATABASE buffer overflow
declare @test varchar(16384)
select @test = replicate('A', 16384)
DROP DATABASE @test
go
All buffer overflows can be abused to execute arbitrary code with elevated privileges.
Solution:
Apply patches:
12.5.0.2 - 11/14/2002
12.0.0.6 ESD#1 - 11/5/2002
http://downloads.sybase.com/swd/swx
Provided and/or discovered by:
Aaron C. Newman, Application Security Inc
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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