Bug 746226 (CVE-2011-3256)

Summary: CVE-2011-3256 freetype: FT_Bitmap_New integer overflow, FreeType TT_Vary_Get_Glyph_Deltas improper input validation
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bressers, mjc, mkasik, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: freetype 2.4.7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-24 15:46:13 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:
Bug Depends On: 747081, 747082, 747083, 747084, 747941, 749174, 749175, 785154, 806289, 889398    
Bug Blocks: 746228, 785174    
Attachments:
Description Flags
upstream patch none

Description Jan Lieskovsky 2011-10-14 12:51:24 UTC 
Common Vulnerabilities and Exposures assigned an identifier CVE-2011-3256 to
the following vulnerability:

FreeType in CoreGraphics in Apple iOS before 5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted font.

References:
[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3256
[2] http://support.apple.com/kb/HT4999
[3] http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html

Relevant upstream patch:
[4] http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=9c98fbf634a83c6ea286395f0e788956eafd5aeb
Comment 4 Jan Lieskovsky 2011-10-18 12:52:30 UTC 
Corrected in v2.4.7 upstream release:
[5] http://sourceforge.net/projects/freetype/files/freetype2/2.4.7/README/view
[6] http://freetype.sourceforge.net/index2.html#release-freetype-2.4.7
Comment 5 Huzaifa S. Sidhpurwala 2011-10-18 14:55:03 UTC 
Created attachment 528829 [details]
upstream patch
Comment 6 Ramon de C Valle 2011-10-18 17:03:15 UTC 
It seems that this issue not only affects the versions of FreeType as shipped with Red Hat Enterprise Linux 4, 5 and 6, but also affects the versions of FreeType embedded in other packages. I'm still not sure if ots can influence on something for Firefox and Thunderbird, because it would reduce its score considerably.
Comment 11 errata-xmlrpc 2011-10-25 18:22:28 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 4
  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2011:1402 https://rhn.redhat.com/errata/RHSA-2011-1402.html
Comment 12 Ramon de C Valle 2011-10-26 12:10:25 UTC 
Created mingw32-freetype tracking bugs for this issue

Affects: fedora-all [bug 749175]
Comment 13 Ramon de C Valle 2011-10-26 12:10:28 UTC 
Created freetype tracking bugs for this issue

Affects: fedora-all [bug 749174]
Comment 14 errata-xmlrpc 2012-02-02 22:33:24 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5.6 EUS - Server Only

Via RHSA-2012:0094 https://rhn.redhat.com/errata/RHSA-2012-0094.html