Bug 1315647 (CVE-2016-1234)

Summary:	CVE-2016-1234 glibc: Stack-based buffer overflow in glob with GLOB_ALTDIRFUNC and crafted directory
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	arjun.is, ashankar, carnil, codonell, dj, fweimer, glibc-bugzilla, jakub, jhunt, law, mfabian, mnewsome, pfrankli, sardella, siddhesh, slawomir, yozone
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glibc 2.24	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-30 06:37:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1315648
Bug Blocks:	1315649

Description Adam Mariš 2016-03-08 10:41:33 UTC

It was found that glob implementation in glibc does not correctly handle overlong names in struct dirent buffers when GLOB_ALTDIRFUNC is used, causing large stack-based buffer overflow with controlled length and content.

Upstream bug (contains reproducer):

https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2016-1234

Comment 1 Adam Mariš 2016-03-08 10:42:04 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1315648]

Comment 5 Stefan Cornelius 2016-07-28 10:36:49 UTC

Upstream patch:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5171f3079f2cc53e0548fc4967361f4d1ce9d7ea

Comment 7 Stefan Cornelius 2016-08-11 10:41:34 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.