Bug 1388777 (CVE-2016-4738)

Summary:	CVE-2016-4738 libxslt: Heap overread due to an empty decimal-separator
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:	apevec, ayoung, bhu, carnil, chrisw, cvsbot-xmlrpc, erik-fedora, esammons, gmollett, iboverma, jross, jschluet, kbasil, lhh, lpeer, markmc, matt, mcressma, mrg-program-list, rbryant, rhos-maint, rhs-bugs, rjones, sardella, sclewis, sgirijan, sisharma, smohan, ssaha, storage-qa-internal, tdecacqu, vbellur, veillard, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-02-09 13:41:14 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:	1388779, 1388780, 1388781
Bug Blocks:	1388784

Description Andrej Nemec 2016-10-26 07:50:45 UTC

A heap overread vulnerability was found in xsltFormatNumberConversion function in libxslt. An empty decimal-separator could cause a heap overread. This can be exploited to leak a couple of bytes after the buffer that holds the pattern string.

Upstream patch:

https://git.gnome.org/browse/libxslt/commit/?id=eb1030de31165b68487f288308f9d1810fed6880

Comment 1 Andrej Nemec 2016-10-26 07:56:24 UTC

Created libxslt tracking bugs for this issue:

Affects: fedora-all [bug 1388779]

Comment 2 Andrej Nemec 2016-10-26 07:56:44 UTC

Created mingw-libxslt tracking bugs for this issue:

Affects: fedora-all [bug 1388780]
Affects: epel-7 [bug 1388781]

Comment 3 Andrej Nemec 2016-10-26 07:59:18 UTC

References:

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4738
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-4738.html

Comment 4 Huzaifa S. Sidhpurwala 2016-10-31 08:50:02 UTC

This issue was initially filed as chromium bug at:

https://bugs.chromium.org/p/chromium/issues/detail?id=619006