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Bug 56024 - Fix for bug #5903 (race condition in lpr) is incomplete--the race condition still exists
Fix for bug #5903 (race condition in lpr) is incomplete--the race condition s...
Product: Red Hat Linux
Classification: Retired
Component: lpr (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Tim Waugh
Brock Organ
: Security
Depends On:
  Show dependency treegraph
Reported: 2001-11-10 20:41 EST by Brian Chess
Modified: 2007-04-18 12:38 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2001-12-18 17:43:22 EST
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Description Brian Chess 2001-11-10 20:41:10 EST
bug #5903 (race condition in lpr) was fixed by adding calls to seteuid()
before the calls to open().  The problem is that the value returned from
seteuid() isn't checked.  If seteuid fails, the race condition is still
there.  Why would seteuid() fail, you ask?  Check out
http://www.securityfocus.com/bid/1322 for an example.
Comment 1 Tim Waugh 2002-01-15 11:47:05 EST
This kernel bug has already been addressed by a kernel advisory.
Comment 2 Brian Chess 2002-01-15 14:37:54 EST
The kernal bug that I pointed out was an example.  If you don't fix the problem 
in lpr, it will be suseptable to all future problems of that type.

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