Bug 1565318 (CVE-2018-9251)

Summary:	CVE-2018-9251 libxml2: infinite loop in xz_decomp function in xzlib.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	athmanem, c.david86, csutherl, erik-fedora, gzaronik, jclere, ktietz, lgao, mbabacek, mturk, myarboro, ohudlick, rjones, slukasik, twalsh, veillard, weli
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libxml2 2.9.9	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-28 16:31:56 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:	1565319, 1565320, 1565321, 1565322
Bug Blocks:	1565324

Description Laura Pardo 2018-04-09 20:08:29 UTC

A flaw was found in libxml2 2.9.8. The xz_decomp function in xzlib.c, 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.


Reference:
https://bugzilla.gnome.org/show_bug.cgi?id=794914

Comment 1 Laura Pardo 2018-04-09 20:09:07 UTC

Created mingw-libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1565320]


Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1565321]


Created mingw-libxml2 tracking bugs for this issue:

Affects: epel-7 [bug 1565319]

Comment 5 Stefan Cornelius 2018-04-11 09:22:48 UTC

Statement:

This issue did not affect the versions of libxml2 as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Comment 9 Sam Fowler 2018-08-22 01:27:27 UTC

Upstream Patch:

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

Comment 11 errata-xmlrpc 2020-04-28 15:57:01 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1827 https://access.redhat.com/errata/RHSA-2020:1827

Comment 12 Product Security DevOps Team 2020-04-28 16:31:56 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-2018-9251