REDHAT-BUG-800607: High severity GNU FreeType vulnerability
An out-of heap-based buffer write flaw was found in the way TrueType bytecode / opcode interpreter of the FreeType font rendering engine performed moving of zone2 pointer point by execution of 'SHift Contour' (SHC) instruction. A remote attacker could provide a specially-crafted font file, which once opened in an application linked against FreeType would lead to that application crash, or, potentially arbitrary code execution with the privileges of the user running the application.
Upstream bug report: [1] https://savannah.nongnu.org/bugs/?35689
Upstream patch: [2] http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=0fc8debeb6c2f6a8a9a2b97332a7c8a0a1bd9e85
Acknowledgements:
Red Hat would like to thank Mateusz Jurczyk of the Google Security Team for reporting this issue.
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-800607?
The severity of REDHAT-BUG-800607 is classified as high with a score of 7.
How do I fix REDHAT-BUG-800607?
To fix REDHAT-BUG-800607, ensure that you are using an updated version of the FreeType font rendering engine that addresses this vulnerability.
What type of flaw is highlighted in REDHAT-BUG-800607?
REDHAT-BUG-800607 highlights a heap-based buffer write flaw in the FreeType font rendering engine.
Who can be affected by REDHAT-BUG-800607?
Any user or application utilizing the FreeType font rendering engine may be affected by REDHAT-BUG-800607 if they render fonts.
What could an attacker achieve by exploiting REDHAT-BUG-800607?
By exploiting REDHAT-BUG-800607, a remote attacker could execute arbitrary code through a specially-crafted font file.