Bug 1452556 (CVE-2017-9049)

Summary:	CVE-2017-9049 libxml2: Heap-based buffer over-read in function xmlDictComputeFastKey
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	athmanem, c.david86, csutherl, dmoppert, erik-fedora, fedora-mingw, gzaronik, jclere, ktietz, lgao, mbabacek, mturk, myarboro, ohudlick, rh-spice-bugs, rjones, sardella, slawomir, twalsh, veillard, weli
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libxml2 2.9.4	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-02-26 05:11:06 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:	1452550, 1452551, 1548945, 1695414
Bug Blocks:	1452558

Description Andrej Nemec 2017-05-19 08:01:41 UTC

libxml2 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2 to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.

References:

http://seclists.org/oss-sec/2017/q2/258

Comment 1 Andrej Nemec 2017-05-19 08:05:31 UTC

Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1452550]

Comment 2 Andrej Nemec 2017-05-19 08:05:40 UTC

Created mingw-libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1452551]

Comment 3 Doran Moppert 2017-05-23 02:36:02 UTC

oss-security report suggests this is the same as CVE-2017-9050, as exactly the same patch is proposed and the stack trace passes through the same function chain.

Comment 7 Doran Moppert 2019-04-03 02:55:26 UTC

Upstream patch:

https://gitlab.gnome.org/GNOME/libxml2/commit/45752d2c3