Bug 1570188 – CVE-2018-10112 gegl: write access violation in gegl_tile_backend_swap_constructed function in buffer/gegl-tile-backend-swap.c

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Bug 1570188 - (CVE-2018-10112) CVE-2018-10112 gegl: write access violation in gegl_tile_backend_swap_constructed function in buffer/gegl-tile-backend-swap.c

Summary:	CVE-2018-10112 gegl: write access violation in gegl_tile_backend_swap_constru...

Status:	NEW

Aliases:	CVE-2018-10112

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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Whiteboard:	impact=moderate,public=20180414,repor...
Keywords:	Security

Depends On:	1570186 1570189 1609102 1609101
Blocks:	1570194
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Reported:	2018-04-20 16:35 EDT by Laura Pardo
Modified:	2018-10-25 19:30 EDT (History)
CC List:	4 users (show)

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Description Laura Pardo 2018-04-20 16:35:30 EDT

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 16:36:52 EDT

Created gegl tracking bugs for this issue:

Affects: fedora-all [bug 1570186]

Comment 3 Doran Moppert 2018-07-26 22:53:33 EDT

Created gegl03 tracking bugs for this issue:

Affects: fedora-all [bug 1609102]

Comment 5 Debarshi Ray 2018-08-24 12:21:32 EDT

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.

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