XFree86 GLX and DRI Screen Number Overflows Let Remote Users Crash the X Server
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SecurityTracker Alert ID: 1009147
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CVE Reference: CAN-2004-0093
, CAN-2004-0094
(Links to External Site)
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Date: Feb 20 2004
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Impact: Denial of service via network
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Description: Two vulnerabilities were reported in XFree86. A remote user can cause the X server to crash.
It is reported that the GLX extension and Direct Rendering Infrastructure components not properly check the user-supplied screen
number parameter. A remote user can send an invalid screen number value to trigger an array index boundary overflow [CVE: CAN-2004-0093]
or an unsigned integer overflow [CVE: CAN-2004-0094]. The result is a segmentation fault, the report said.
The flaws reportedly
reside in 'xf86dri.c' and 'glxcmds.c'.
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Impact: A remote user can cause the target X server to crash.
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Solution: No upstream solution was available at the time of this entry.
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Vendor URL: www.xfree86.org/ (Links to External Site)
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Cause: Boundary error, Input validation error
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Underlying OS: Linux (Any), UNIX (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Fri, 20 Feb 2004 07:43:24 -0500
Subject: CAN-2004-0093, CAN-2004-0094
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CVE: CAN-2004-0093, CAN-2004-0094
Debian reported:
Denial-of-service attacks against the X
server by clients using the GLX extension and Direct Rendering
Infrastructure are possible due to unchecked client data (out-of-bounds
array indexes [CAN-2004-0093] and integer signedness errors
[CAN-2004-0094]).
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