90 lines
No EOL
2.4 KiB
Text
90 lines
No EOL
2.4 KiB
Text
#######################################################################
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Luigi Auriemma
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Application: Novell GroupWise Messenger
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http://www.novell.com/products/groupwise/
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Versions: <= 2.1.0
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Platforms: Windows, Linux, NetWare
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Bug: memory corruption
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Exploitation: remote, versus server
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Date: 16 Feb 2012 (found 10 May 2011)
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Author: Luigi Auriemma
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e-mail: aluigi@autistici.org
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web: aluigi.org
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#######################################################################
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1) Introduction
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2) Bug
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3) The Code
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4) Fix
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#######################################################################
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===============
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1) Introduction
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===============
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Check vendor's homepage and version because this is an old advisory.
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#######################################################################
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======
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2) Bug
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======
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nmma.exe is a service running on port 8300.
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The NM_A_PARM1 tag of the "login" command is the base64 of the
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"username::password" string encrypted with blowfish.
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This tag has the value 10 which is relative to the strings, but exists
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another type defined as 12 which instead is used for particular data
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("nested arrays") and when used for login->NM_A_PARM1 allows to corrupt
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the heap memory:
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0042BCD9 |. 8B0B MOV ECX,DWORD PTR DS:[EBX] ; 3
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0042BCDB |. 8B55 FC MOV EDX,DWORD PTR SS:[EBP-4] ; 3
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0042BCDE |. C1EE 02 SHR ESI,2
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0042BCE1 |. 81C6 55555555 ADD ESI,55555555
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0042BCE7 |. 8D0476 LEA EAX,DWORD PTR DS:[ESI+ESI*2]
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0042BCEA |. 50 PUSH EAX ; 0xffffffff
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0042BCEB |. 51 PUSH ECX ; heap
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0042BCEC |. 52 PUSH EDX ; context
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0042BCED |. E8 5E0E0000 CALL nmma.0042CB50 ; blowfish
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Through additional packets before and after the malformed one (the
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service is multi-thread) may be possible to control the corruption.
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#######################################################################
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===========
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3) The Code
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===========
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http://aluigi.org/poc/nmma_x.zip
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/18489.zip (nmma_x.zip)
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nmma_x 1 SERVER
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#######################################################################
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======
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4) Fix
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======
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No fix.
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####################################################################### |