Bug 1520227 – CVE-2017-16938 optipng: global buffer overflow in gifread.c:LZWReadByte when parsing malicious GIF

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Bug 1520227 - (CVE-2017-16938) CVE-2017-16938 optipng: global buffer overflow in gifread.c:LZWReadByte when parsing malicious GIF

Summary:	CVE-2017-16938 optipng: global buffer overflow in gifread.c:LZWReadByte when ...

Status:	CLOSED WONTFIX

Aliases:	CVE-2017-16938

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

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20171124,reported=2...
Keywords:	Security

Depends On:	1520230
Blocks:	1520229
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Reported:	2017-12-04 00:04 EST by Sam Fowler
Modified:	2018-02-12 04:57 EST (History)
CC List:	3 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:	An invalid memory write flaw was found in the way OptiPNG handles processing of GIF files. This flaw could potentially be used to crash the OptiPNG program by tricking it into processing crafted GIF files.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-01-05 03:14:45 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Sam Fowler 2017-12-04 00:04:11 EST

A global buffer overflow in OptiPNG 0.7.6 allows remote attackers to cause a denial-of-service attack with a maliciously crafted GIF format file, related to an uncontrolled loop in the LZWReadByte function of the gifread.c file.

References:

https://nvd.nist.gov/vuln/detail/CVE-2017-16938
https://bugs.debian.org/878839
https://bugs.gentoo.org/639690
https://bugs.mageia.org/show_bug.cgi?id=22099
https://bugzilla.suse.com/show_bug.cgi?id=1069774
https://sourceforge.net/p/optipng/bugs/69/
https://sourceforge.net/p/optipng/bugs/_discuss/thread/10e27bff/63db/attachment/optipng-076-sfbug-69.patch

Comment 1 Sam Fowler 2017-12-04 00:22:11 EST

Created optipng tracking bugs for this issue:

Affects: fedora-all [bug 1520230]

Comment 3 Dhiru Kholia 2018-01-05 03:17:30 EST

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/.

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