OllyDbg will crash if a target process loads a module that contains a long name with more of 200 characters. This could be used for antidebugging purposes.
This vulnerability has been discovered by ATmaCA. Here is the original advisory from Securityfocus:
hxxp://www.securityfocus.com/archive/1/393747/2005-03-17/2005-03-23/0
Quote:
Vendor:
Oleh Yuschuk
Application:
OllyDbg
http://home.t-online.de/home/Ollydbg/
Introduction:
OllyDbg is a 32-bit assembler level analysing debugger for Microsoft® Windows®.
Emphasis on binary code analysis makes it particularly useful in cases where source
is unavailable.
Affected Versions:
1.10 (final version) and prior versions.
Overview:
In OllyDbg, if a target process loads modules that contains long name
(greater than around 200 bytes), OllyDbg will be crashed.
This hole can be used for an anti-debug method for OllyDbg.
Vendor Status:
No vendor response.
Discovery:
ATmaCA
atmaca atmacasoft com
www.atmacasoft.com
www.spyinstructors.com
Credit to Kozan
POC:
Debug this program with OllyDbg,
when the program runs, a folder that named "olly hole" will be
created on desktop and a long named dll will be created in
this folder. then it will load this and finally
olly debug will be crashed.
http://www.atmacasoft.com/exp/OllyHole.exe
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