Patch  oval:com.redhat.rhsa:def:20111105
RHSA-2011:1105: libpng security update (Moderate)  

The libpng packages contain a library of functions for creating and manipulating PNG (Portable Network Graphics) image format files.
A buffer overflow flaw was found in the way libpng processed certain PNG image files. An attacker could create a specially-crafted PNG image that, when opened, could cause an application using libpng to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2011-2690)
Note: The application behavior required to exploit CVE-2011-2690 is rarely used. No application shipped with Red Hat Enterprise Linux behaves this way, for example.
An out-of-bounds memory read flaw was found in the way libpng processed certain PNG image files. An attacker could create a specially-crafted PNG image that, when opened, could cause an application using libpng to crash. (CVE-2011-2501)
An uninitialized memory read issue was found in the way libpng processed certain PNG images that use the Physical Scale (sCAL) extension. An attacker could create a specially-crafted PNG image that, when opened, could cause an application using libpng to crash. (CVE-2011-2692)
Users of libpng should upgrade to these updated packages, which upgrade libpng to version 1.2.46 to correct these issues. All running applications using libpng must be restarted for the update to take effect.
Create Date: 2011-07-28 Last Update Date: 2011-07-28

Affected Platforms/Products

Affected Products (CPE + CVE references)
  • Libpng  Libpng  
  • Redhat  Enterprise Linux  
  • cpe:/o:redhat:enterprise_linux:6::client
  • cpe:/o:redhat:enterprise_linux:6::computenode
  • cpe:/o:redhat:enterprise_linux:6::server
  • cpe:/o:redhat:enterprise_linux:6::workstation
Platforms: unix (from OVAL definitions)
  • Red Hat Enterprise Linux 6

References

Criteria

The patch should be installed
IF : Any one of the following are true
IF : Red Hat Enterprise Linux must be installed
WARNING! Unknown test oval:com.redhat.rhba:tst:20070026004. Please see help for possible reasons
IF : All of the following are true
IF : Red Hat Enterprise Linux 6 is installed
WARNING! Unknown test oval:com.redhat.rhba:tst:20111656003. Please see help for possible reasons
IF : Any one of the following are true
IF : All of the following are true
IF : libpng is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  libpng is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20040180002 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : libpng is earlier than 2:1.2.46-1.el6_1
Linux : RPM Test :  libpng is earlier than 2:1.2.46-1.el6_1 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20040180002 (Object depth limit may be exceeded) !!!
RPM Version less than 2:1.2.46-1.el6_1 (datatype=evr_string)
linux : rpminfo_state 
IF : All of the following are true
IF : libpng-static is signed with Red Hat redhatrelease2 key
WARNING! Unknown test oval:com.redhat.rhsa:tst:20111105004. Please see help for possible reasons
IF : libpng-static is earlier than 2:1.2.46-1.el6_1
WARNING! Unknown test oval:com.redhat.rhsa:tst:20111105003. Please see help for possible reasons
IF : All of the following are true
IF : libpng-devel is earlier than 2:1.2.46-1.el6_1
WARNING! Unknown test oval:com.redhat.rhsa:tst:20111105001. Please see help for possible reasons
IF : libpng-devel is signed with Red Hat redhatrelease2 key
WARNING! Unknown test oval:com.redhat.rhsa:tst:20111105002. Please see help for possible reasons

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