Bug 1351603 (CVE-2016-6128) - CVE-2016-6128 gd: Invalid color index not properly handled
Summary: CVE-2016-6128 gd: Invalid color index not properly handled
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-6128
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1351604 1370014
Blocks: 1351605
TreeView+ depends on / blocked
 
Reported: 2016-06-30 12:19 UTC by Adam Mariš
Modified: 2021-02-17 03:38 UTC (History)
20 users (show)

Fixed In Version: php 5.6.25, php 7.0.10
Doc Type: If docs needed, set a value
Doc Text:
It was found that libgd did not properly handle invalid color indexes in GD files. An attacker who could submit a crafted GD file for conversion could cause applications using libgd to crash, leading to denial of service.
Clone Of:
Environment:
Last Closed: 2016-08-25 04:20:55 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2750 0 normal SHIPPED_LIVE Moderate: rh-php56 security, bug fix, and enhancement update 2016-11-15 16:40:02 UTC

Description Adam Mariš 2016-06-30 12:19:05 UTC 
It was found that libgd did not properly handle invalid color index, which could lead to a denial of service against applications using the libgd library.

Upstream patches:

https://github.com/libgd/libgd/compare/3fe0a7128bac5000fdcfab888bd2a75ec0c9447d...fd623025505e87bba7ec8555eeb72dae4fb0afd

CVE assignment:

http://seclists.org/oss-sec/2016/q2/627
Comment 1 Adam Mariš 2016-06-30 12:19:33 UTC 
Created gd tracking bugs for this issue:

Affects: fedora-all [bug 1351604]
Comment 2 Doran Moppert 2016-07-06 04:49:05 UTC 
The functionality affected by this flaw was introduced after gd-2.0.35, which is the latest version packaged in RHEL.
Comment 5 Doran Moppert 2016-07-07 05:05:49 UTC 
The impact of this flaw is limited by gd_security.c:  specifying an out of
range colour will cause out-of-bounds reads in gdImageCropThreshold, which can
lead to an attempt to crop the image to an invalid size.  Bounds checks in
gdImageCrop* functions ensure that no OOB data is copied into the final image,
and overflow2() prevents allocations from failing due to overflow/negative
sizes.

Maximum impact is a crash, but CVSS needs to reflect AV:N.
Comment 8 Doran Moppert 2016-08-25 04:16:17 UTC 
Statement:

Red Hat Product Security has rated this issue as having Low security
impact. This issue is not currently planned to be addressed in future
updates. For additional information, refer to the Issue Severity
Classification: https://access.redhat.com/security/updates/classification/.
Comment 9 Doran Moppert 2016-08-25 04:17:50 UTC 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1370014]
Comment 10 errata-xmlrpc 2016-11-15 11:42:27 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html
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