Bug 1524378 - libgxps: integer overflow when loading XPS documents containing specially crafted PNG files
Summary: libgxps: integer overflow when loading XPS documents containing specially cra...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1591132 1591133
Blocks: 1487550
TreeView+ depends on / blocked
 
Reported: 2017-12-11 11:44 UTC by Stefan Cornelius
Modified: 2021-02-17 01:08 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 03:33:01 UTC
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Description Stefan Cornelius 2017-12-11 11:44:13 UTC 
An integer overflow flaw exists within the "gxps_images_create_from_png()" function in libgxps/gxps-images.c. An attacker can exploit this flaw to cause a heap-based buffer overflow by tricking a user into opening a specially crafted XPS document in an application using libgxps.
Comment 1 Stefan Cornelius 2017-12-12 09:17:14 UTC 
Actually, it seesm like RHEL7 is not affected. We have a patch (libgxps-0.2.4-GXPSImage.patch), which appears to always cause a crash shortly before reaching the vulnerable code path.
Comment 2 Stefan Cornelius 2018-04-04 08:59:04 UTC 
Upstream patch:
https://github.com/GNOME/libgxps/commit/123dd99c6a1ae2ef6fcb5547e51fa58e8c954b51

Something that may be worth backporting:
https://github.com/GNOME/libgxps/commit/672c65ea8cbd2bcfd82a6b6498a4f1eb9daf5ec5
Comment 3 Stefan Cornelius 2018-04-04 08:59:08 UTC 
Acknowledgments:

Name: Stefan Cornelius (Red Hat)
Comment 5 Stefan Cornelius 2018-06-14 06:57:03 UTC 
Created libgxps tracking bugs for this issue:

Affects: fedora-all [bug 1591132]
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