Solaris Xsun Direct Graphics Access Mode Insecure Temporary Files May Allow Local Users to Gain Root Privileges
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SecurityTracker Alert ID: 1008363
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Dec 3 2003
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Impact: Denial of service via local system, Modification of system information, Modification of user information, Root access via local system
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Fix Available: Yes
Vendor Confirmed: Yes
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Description: A vulnerability was reported in the Xsun(1) Solaris X11 server when run in Direct Graphics Access (DGA) mode. A local user may be able to gain root privileges.
It is reported that on systems running the Xsun(1), a local user may be able to overwrite or create arbitrary files with root privileges
due to a flaw in Xsun(1) in DGA mode. A local user can create a symbolic link (symlink) from a critical file on the system to a
temporary file name to be used by Xsun. Then, when any application that uses DGA is executed, the linked file may be overwritten
or created with root privileges.
A local user can also cause the Xsun process of any user of a DGA application to crash.
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Impact: A local user can overwrite or create arbitrary files with root privileges, potentially giving the local user root access on the system.
A local user can cause the Xsun process of a target user of a DGA application to crash.
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Solution: Sun has issued the following fixes:
SPARC Platform
Solaris 2.6 with patch 105633-64 or later
Solaris 7 with patch 108376-44
or later
Solaris 8 with patch 108652-72 or later
Solaris 9 with patch 112785-25 or later
x86 Platform
Solaris 2.6 with patch
106248-49 or later
Solaris 7 with patch 108377-39 or later
Solaris 8 with patch 108653-61 or later
Solaris 9 with patch 112786-15
or later
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Vendor URL: sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F57419 (Links to External Site)
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Cause: Access control error, State error
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Underlying OS: UNIX (Solaris - SunOS)
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Underlying OS Comments: 2.6, 7, 8, and 9
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Message History:
None.
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Source Message Contents
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Date: Wed, 03 Dec 2003 08:29:02 -0500
Subject: http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F57419
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http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F57419
57419 Running Xsun Server in Direct Graphics Access (DGA) Mode May Allow Creation of
Temporary Files Insecurely or Allow a "Denial of Service" Attack 2 Dec 2003
Sun reported that on systems running the Xsun(1) Solaris X11 server, a local user may be
able to overwrite or create arbitrary files with root privileges due to a flaw in Xsun(1)
and Direct Graphics Access (DGA) mode.
A local user can also cause the Xsun process of any user of a DGA application to crash.
These flaws can reportedly be triggered during the use of any application that uses DGA.
Sun has issued the following fixes:
SPARC Platform
Solaris 2.6 with patch 105633-64 or later
Solaris 7 with patch 108376-44 or later
Solaris 8 with patch 108652-72 or later
Solaris 9 with patch 112785-25 or later
x86 Platform
Solaris 2.6 with patch 106248-49 or later
Solaris 7 with patch 108377-39 or later
Solaris 8 with patch 108653-61 or later
Solaris 9 with patch 112786-15 or later
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Sun Alert ID: 57419
Synopsis: Running Xsun Server in Direct Graphics Access (DGA) Mode May Allow Creation of
Temporary Files Insecurely or Allow a "Denial of Service" Attack
Category: Security
Product: Solaris, Xserver
BugIDs: 4680913
Avoidance: Patch
State: Resolved
Date Released: 02-Dec-2003
Date Closed: 02-Dec-2003
Date Modified:
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