Bug 1570188 (CVE-2018-10112)

Summary:	CVE-2018-10112 gegl: write access violation in gegl_tile_backend_swap_constructed function in buffer/gegl-tile-backend-swap.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dakingun, debarshir, jridky, nphilipp
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:	2021-10-21 20:02:20 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:	1570186, 1570189, 1609101, 1609102
Bug Blocks:	1570194

Description Laura Pardo 2018-04-20 20:35:30 UTC

A flaw was discovered in GEGL through 0.3.32. The gegl_tile_backend_swap_constructed function in buffer/gegl-tile-backend-swap.c allows remote attackers to cause a denial of service (write access violation) or possibly have unspecified other impact via a malformed PNG file that is mishandled during a call to the babl_format_get_bytes_per_pixel function in babl-format.c in babl 0.1.46.


References:
https://bugzilla.gnome.org/show_bug.cgi?id=795249
https://github.com/xiaoqx/pocs/tree/master/gegl

Comment 1 Laura Pardo 2018-04-20 20:36:52 UTC

Created gegl tracking bugs for this issue:

Affects: fedora-all [bug 1570186]

Comment 3 Doran Moppert 2018-07-27 02:53:33 UTC

Created gegl03 tracking bugs for this issue:

Affects: fedora-all [bug 1609102]

Comment 5 Debarshi Ray 2018-08-24 16:21:32 UTC

As an upstream contributor to GEGL, and a downstream Fedora packager, I am surprised that this managed to bubble all the way up to becoming a CVE!

As far as I can make out, this was originally filed as https://bugzilla.gnome.org/show_bug.cgi?id=795249, which got migrated to https://gitlab.gnome.org/GNOME/gegl/issues/65 Note the complete lack of response from the reporter after the initial submission. Anyway, I have added a comment to the Gitlab issue that should clarify the situation a bit more.

In short, this is a known problem that's being worked on. It's not possible to fix it with a small localized fix that can be carried downstream.