Bug 10877 - RedHat 6.x X Font Server DoS Vulnerability
RedHat 6.x X Font Server DoS Vulnerability
Product: Red Hat Linux
Classification: Retired
Component: XFree86 (Show other bugs)
All Linux
high Severity medium
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Assigned To: Mike A. Harris
: Security
: 10897 10951 (view as bug list)
Depends On:
  Show dependency treegraph
Reported: 2000-04-17 14:38 EDT by Matthew Miller
Modified: 2008-05-01 11:37 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2001-04-24 12:27:36 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Matthew Miller 2000-04-17 14:38:15 EDT
See: http://www.securityfocus.com/vdb/bottom.html?vid=1111

From the discussion there:

A denial of service exists in the X11 font server shipped with RedHat Linux
6.x. Due to improper input validation, it is possible for any user to crash
the X fontserver. This will prevent the X server from functioning properly.

(There is also an exploit:
http://www.securityfocus.com/data/vulnerabilities/exploits/kill-xfs.c )
Comment 1 Bill Nottingham 2000-04-18 15:27:59 EDT
*** Bug 10897 has been marked as a duplicate of this bug. ***
Comment 2 Matthew Miller 2000-05-24 13:39:59 EDT
Any word on this? Not only would it be nice to have these things fixed, it looks
bad for Linux in general when it takes a long time. (See, for instance

(I'm sorry that I don't have the programming skills myself to give you a patch.)
Comment 3 Bernhard Rosenkraenzer 2000-12-20 07:50:47 EST
*** Bug 10951 has been marked as a duplicate of this bug. ***
Comment 4 Mike A. Harris 2001-05-25 10:45:54 EDT
Fixed in our currently pending errata soon to be released.

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