Bug 150323

Summary: CAN-2005-0761 Bug in parsing PSD files
Product: Red Hat Enterprise Linux 3 Reporter: Josh Bressers <bressers>
Component: ImageMagickAssignee: Matthias Clasen <mclasen>
Status: CLOSED ERRATA QA Contact: Mike McLean <mikem>
Severity: low Docs Contact:
Priority: medium    
Version: 3.0Keywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=low,public=20040609,source=vendorsec,reported=20050304
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-03-23 10:07:21 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
Proposed patch for this issue.
none
Demo exploit for this issue. none

Description Josh Bressers 2005-03-04 16:46:26 UTC 
This issue consists of two bugs:

- conversion from and to quantum, it probably worked only for quantumdepth=8,
  but ImageMagick was compiled with quantumdepth=16.
  The attached patch fixes it.

- The function ReadBlobByte returns values in range 0-255 or (int)-1 on EOF.
  The return value -1 is not checked on many places. The patch
  adds some type conversion, so that it does not crash on issue3.psd.
  However it could crash elsewhere.
Comment 1 Josh Bressers 2005-03-04 16:48:32 UTC 
This issue should also affect RHEL2.1
Comment 2 Josh Bressers 2005-03-04 16:49:06 UTC 
Created attachment 111669 [details]
Proposed patch for this issue.
Comment 3 Josh Bressers 2005-03-04 16:49:58 UTC 
Created attachment 111670 [details]
Demo exploit for this issue.
Comment 4 Matthias Clasen 2005-03-17 21:48:50 UTC 
This is covered by RHSA-2005:070-09
Comment 5 Mark J. Cox 2005-03-23 10:07:21 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-070.html