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Cpio Large File Size Handling Denial of Service Vulnerability
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Secunia Advisory:
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SA18251
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Release Date:
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2006-01-03
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Popularity:
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6,896 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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Unpatched
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| Software: | cpio 2.x
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| CVE reference: | CVE-2005-4268
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Description:
Richard Harms has reported a vulnerability in cpio, which potentially can be exploited by malicious, local users to cause a DoS (Denial of Service).
The vulnerability is caused due to a boundary error in the "write_out_header()" function of "copyout.c" when creating the file header. This can be exploited to cause a buffer overflow when the size of the file that is backed up is more than 8 digits long.
Successful exploitation allows malicious users to e.g. disrupt automated backup processes.
The vulnerability has been reported in version 2.6 and affects only the 64-bit platforms.
Solution:
Restrict the size of files that users can create on affected systems.
Some Linux vendors have released updated packages.
Provided and/or discovered by:
Richard Harms
Original Advisory:
Red Hat Bugzilla:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=172669
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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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