Bug 1581269 (CVE-2018-11236)

Summary:	CVE-2018-11236 glibc: Integer overflow in stdlib/canonicalize.c on 32-bit architectures leading to stack-based buffer overflow
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, alanm, aoliva, arjun.is, ashankar, codonell, dbaker, dj, fweimer, glibc-bugzilla, jokerman, law, mfabian, mnewsome, pfrankli, rth, siddhesh, sthangav, trankin, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glibc 2.28	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:26:11 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:	1579742, 1581270, 1581271, 1581881, 1581882, 1582343, 1582344, 1849766
Bug Blocks:	1581279

Description Andrej Nemec 2018-05-22 12:49:42 UTC

stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.

Upstream issue:

https://sourceware.org/bugzilla/show_bug.cgi?id=22786

Upstream patch:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5460617d1567657621107d895ee2dd83bc1f88f2

Product bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1579742

Comment 1 Andrej Nemec 2018-05-22 12:50:29 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1581270]

Comment 9 errata-xmlrpc 2018-10-30 07:36:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3092 https://access.redhat.com/errata/RHSA-2018:3092

Comment 10 Marian Rehak 2019-06-14 10:17:56 UTC

Statement:

Red Hat Product Security has rated this issue as having moderate security impact and a future update may address this flaw.