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ncpfs NWDSCreateContextHandleMnt Buffer Overflow Vulnerability
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Secunia Advisory:
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SA13292
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Release Date:
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2004-11-30
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Last Update:
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2004-12-07
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Popularity:
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6,794 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| Software: | ncpfs 2.x
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| CVE reference: | CVE-2004-1079
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Description:
Karol Wiesek has reported a potential vulnerability in ncpfs, which can be exploited by malicious, local users.
The problem is caused due to a boundary error within the "NWDSCreateContextHandleMnt()" function when handling tree names. This can be exploited via ncpmap or ncplogin (both utilities installed setuid "root" on some Linux distributions) to cause a buffer overflow by passing an overly long argument (about 330 bytes) as a tree name to the "-T" command line option.
Successful exploitation causes an access violation. The issue is currently not believed to be exploitable for code execution, but this cannot be ruled out completely.
The issue has been reported in version 2.2.4. Other versions may also be affected.
Solution:
Update to version 2.2.5.
ftp://platan.vc.cvut.cz/pub/linux/ncpfs/
Provided and/or discovered by:
Karol Wiesek
Changelog:
2004-12-06: Updated "Solution" section.
2004-12-07: Added CVE reference.
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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