Bug 1444898 (CVE-2017-7857)

Summary:	CVE-2017-7857 freetype: heap-based buffer overflow related to the TT_Get_MM_Var function
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	behdad, bmcclain, cfergeau, dblechte, eedri, erik-fedora, fedora-mingw, fonts-bugs, kevin, lsurette, mgoldboi, michal.skrivanek, mkasik, rbalakri, rh-spice-bugs, rjones, sardella, sherold, srevivo, ykaul, ylavi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-29 04:48:33 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:	1444915, 1444916, 1444917
Bug Blocks:	1444919

Description Adam Mariš 2017-04-24 14:04:06 UTC

FreeType 2 before 2017-03-08 has an out-of-bounds write caused by a heap-based buffer overflow related to the TT_Get_MM_Var function in truetype/ttgxvar.c and the sfnt_init_face function in sfnt/sfobjs.c.

Bug report:

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=759

Upstream patch:

https://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=7bbb91fbf47fc0775cc9705673caf0c47a81f94b

Comment 1 Adam Mariš 2017-04-24 14:28:52 UTC

Created freetype tracking bugs for this issue:

Affects: fedora-all [bug 1444917]


Created mingw-freetype tracking bugs for this issue:

Affects: epel-7 [bug 1444915]
Affects: fedora-all [bug 1444916]

Comment 2 Marek Kašík 2017-04-28 15:26:40 UTC

While I can reproduce this with the commit mentioned in the chromium bug report I can not reproduce this on F24, F25, F26 or rawhide.