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GNOME Display Manager Multiple Vulnerabilities
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Secunia Advisory:
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SA9571
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Release Date:
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2003-08-22
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Popularity:
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9,016 views
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
DoS
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | GNOME Display Manager (GDM) 2.x
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Subscribe:
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| CVE reference: | CVE-2003-0547
CVE-2003-0548
CVE-2003-0549
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Description:
Three vulnerabilities have been reported in GNOME Display Manager (GDM), which can be exploited by malicious users to read arbitrary files on the system or cause a Denial of Service (DoS).
The first vulnerability is caused due to an error in the "examine session errors" feature. The problem is that GDM reads the "~/.xsession-errors" file with "root" privileges, which can be exploited to disclose the content of arbitrary files on the system via a symlink attack.
Successful exploitation requires that the session lasts less than 10 seconds.
The two other vulnerabilities are caused due to errors in the X Display Manager Control Protocol (XDMCP), which can be exploited by malicious people to crash the gdm daemon.
Solution:
The vulnerabilities have been fixed in version 2.4.2.100 and later.
http://ftp.gnome.org/pub/GNOME/sources/gdm/2.4/
Original Advisory:
http://cvs.gnome.org/lxr/source/gdm2/NEWS#83
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About this Secunia Advisory
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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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