[UNIX] ktools Buffer Overflow
From: SecuriTeam (support_at_securiteam.com)
Date: 11/27/05
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To: list@securiteam.com Date: 27 Nov 2005 12:58:17 +0200
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ktools Buffer Overflow
------------------------------------------------------------------------
SUMMARY
" <http://konst.org.ua/ktools> ktools main purpose is to provide various
text-mode user interface controls without a need to write too much code."
Lack of proper length validation by the ktools product, allows attackers
to cause the program to execute arbitrary code by overflowing an internal
buffer.
DETAILS
Vulnerable Systems:
* ktools version 0.3 and prior
The macro VGETSTRING in the header file of kkstrtext.h contain a buffer
overflow for any string that is bigger then 1024 chars. The programs
centericq, Orpheus, Motor and Groan use ktools and are therefore
vulnerable to attack.
Vulnerable Code:
kkstrtext.h:
#define VGETSTRING(c, fmt) \
{ \
va_list vgs__ap; char vgs__buf[1024]; \
va_start(vgs__ap, fmt); \
vsprintf(vgs__buf, fmt, vgs__ap); c = vgs__buf; \
va_end(vgs__ap); \
}
ADDITIONAL INFORMATION
The information has been provided by <mailto:siegfri3d@gmail.com>
Siegfried.
The original article can be found at:
<http://www.zone-h.org/en/advisories/read/id=8480/>
http://www.zone-h.org/en/advisories/read/id=8480/
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