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openmosix-overflow.txt

openmosix-overflow.txt
Posted Apr 8, 2008
Authored by Jose Carlos Norte

The openMosix userspace library suffers from a stack based buffer overflow.

tags | advisory, overflow
SHA-256 | a3f5f6c38b8b4ddeb5355adc588fcdac7260a54b8f8a3a7113ce7762250a2ae0

openmosix-overflow.txt

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title: openMosix userspace library stack-based buffer overflow
Discovered by: Jose Carlos Norte

There are a lot of buffer overflows present in the library of the openMosix project, documented at:

http://www.openmosixview.com/docs/openMosixAPI.html

The vulnerable code is in:

http://openmosix.cvs.sourceforge.net/openmosix/userspace-tools/moslib/libmosix.c?revision=1.6&view=markup

134 int64_t
135 msx_readnode(int node, const char *item)
136 {
137 char fn[40];
138 int64_t val;
139
140 if(!node && !(node = msx_read("/proc/hpc/admin/mospe")))
141 return(-1);
142 sprintf(fn, "/proc/hpc/nodes/%d/%s", node, item);

in line 142 there is no check against overflow in "item" argument.

Every applications using this library, can be vulnerable to attacks exploiting this flaw.
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