ed0e1e4d44
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82 lines
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2.9 KiB
Text
82 lines
No EOL
2.9 KiB
Text
/*
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# Exploit Title: CA Internet Security Suite 2010 KmxSbx.sys Kernel Pool
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Overflow 0-day Exploit
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# Date: 2010-11-28
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# Author: Nikita Tarakanov (CISS Research Team)
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# Software Link:
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http://shop.ca.com/ca/products/internetsecurity/internetsecurity_suite.asp
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# Version: up to date, KmxSbx.sys version 6.2.0.22
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# Tested on: Win XP SP3
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# CVE : CVE-NO-MATCH
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# Status : Unpatched
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*/
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1.Description:
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The KmxSbx.sys kernel driver distributed with CA Security Suite contains
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a pool corruption vulnerability in the handling of IOCTL 0x88000080.
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Exploitation of this issue allows an attacker to execute arbitrary code
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within the kernel.
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An attacker would need local access to a vulnerable computer to exploit
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this vulnerability.
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Affected application: CA Internet Security Suite 2010.
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Affected file: KmxSbx.sys version 6.2.0.22.
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2.Vulnerability details:
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[..]
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.text:00016330 mov cx, [eax] ; eax points to
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attacker controlled data
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.text:00016333 inc eax
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.text:00016334 inc eax
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.text:00016335 test cx, cx
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.text:00016338 jnz short loc_16330
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.text:0001633A sub eax, edx
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.text:0001633C sar eax, 1
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.text:0001633E lea eax, [eax+eax+50h] ; size of
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UNICODE string + 0x50 bytes
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.text:00016342 movzx edi, ax ; integer wrap here!
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.text:00016345
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.text:00016345 loc_16345: ; CODE XREF:
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sub_162D8+53j
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.text:00016345 movzx eax, di
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.text:00016348 push ebx
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.text:00016349 xor ebx, ebx
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.text:0001634B cmp eax, ebx
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.text:0001634D jz short loc_16359
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.text:0001634F push eax ; NumberOfBytes
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.text:00016350 push ebx ; PoolType
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.text:00016351 call ds:ExAllocatePool ; Miscalculated
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Pool!!!
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.text:00016357 mov ebx, eax
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[..]
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.text:000163A6 movzx esi, word ptr [edx]
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.text:000163A9 mov [eax+edx], si ; Pool overflow here!
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.text:000163AD inc edx
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.text:000163AE inc edx
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.text:000163AF test si, si
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3.Exploitation:
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1.To exploit this vulnerability we have to allocate shellcode at some
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address, craft fake chunk header, that creates write4 primitive.
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2.To invoke our shellcode we have to set such values in Flink,Blink,
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that points to some pointer in kernel space, and address of our r0
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shellcode.When unlinking happens, we overwrite pointer in kernel space,
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and force execution with kernel priviligies(cpl==0).
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*3.Pool repair
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Exploit code is in CAInternetSecuritySuite2010.zip file.
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/15624.zip (CAInternetSecuritySuite2010.zip) |