Bug 1619875 (CVE-2018-14567)

Summary:	CVE-2018-14567 libxml2: Infinite loop caused by incorrect error detection during LZMA decompression
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, athmanem, bmcclain, c.david86, csutherl, dbaker, dblechte, dfediuck, dking, dmoppert, eedri, erik-fedora, gzaronik, jclere, jokerman, ktietz, mbabacek, mgoldboi, michal.skrivanek, mturk, ohudlick, rh-spice-bugs, rjones, sbonazzo, sherold, sthangav, trankin, twalsh, veillard
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libxml2 2.9.7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-31 22:33:08 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:	1619878, 1619879, 1619880, 1619881, 1622715
Bug Blocks:	1619882

Description Sam Fowler 2018-08-22 01:47:36 UTC

libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035 and CVE-2018-9251.


Upstream Patch:

https://gitlab.gnome.org/GNOME/libxml2/commit/2240fbf5912054af025fb6e01e26375100275e74

Comment 1 Sam Fowler 2018-08-22 01:50:18 UTC

Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1619878]


Created mingw-libxml2 tracking bugs for this issue:

Affects: epel-7 [bug 1619880]
Affects: fedora-all [bug 1619879]

Comment 4 Scott Gayou 2018-08-27 19:38:30 UTC

RHEL5/6 use a libxml2 version released before it had LZMA support.

Comment 7 Doran Moppert 2018-08-31 05:28:22 UTC

Statement:

Red Hat Product Security has rated this flaw as having Low impact. A future update may address this issue.

Comment 8 Doran Moppert 2019-04-03 02:49:25 UTC

This was introduced in upstream version 2.9.6 via the following commit:

https://gitlab.gnome.org/GNOME/libxml2/commit/e2a9122b8d

Comment 9 errata-xmlrpc 2020-03-31 19:33:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1190 https://access.redhat.com/errata/RHSA-2020:1190

Comment 10 Product Security DevOps Team 2020-03-31 22:33:08 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-14567