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Debian Network Installation Insecure Default Directory Permissions
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Secunia Advisory:
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SA19331
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Release Date:
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2006-03-23
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Last Update:
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2006-03-27
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Popularity:
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7,319 views
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Critical:
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Not critical
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Impact:
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Security Bypass
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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| OS: | Debian GNU/Linux 3.1
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| CVE reference: | CVE-2006-1376
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Description:
Ferenczi Viktor has discovered a weakness in Debian, which can be exploited by malicious, local users to bypass certain security restrictions and potentially cause a DoS (Denial of Service).
The weakness is caused due to the "/var/log/debian-installer/cdebconf" directory being left behind with world-writable permissions after completion of installation using the network install CD. This can potentially be exploited by malicious users to cause a DoS by e.g. filling up the /var/log partition.
The vulnerability has been confirmed in debian-31r1a-i386-netinst.iso and also reported in version 3.1r1. Other versions may also be affected.
Solution:
Configure appropriate permissions for the "/var/log/debian-installer/cdebconf" directory.
Provided and/or discovered by:
Ferenczi Viktor
Changelog:
2006-03-27: Added CVE reference.
Original Advisory:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=358210
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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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