Bug 1299754

Summary:	glibc: Bypass the pointer guarding protection on set-user-ID and set-group-ID executables (PTR_MANGLE)
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arjun.is, ashankar, codonell, fweimer, jakub, law, mfabian, mnewsome, pfrankli, siddhesh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-19 08:54:55 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:	1276761, 1299755
Bug Blocks:

Description Huzaifa S. Sidhpurwala 2016-01-19 08:47:07 UTC

A weakness was found in the dynamic loader in glibc prior to 2.22.90. LD_POINTER_GUARD in the enivronment was not sanitized, allowing local attackers to bypass the pointer guarding protection on set-user-ID and set-group-ID executables.

This is a different security flaw then CVE-2013-4788, and only executables which dynamically link against glibc are affected.

This issue has been fixed upstream via the following commit:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=a014cecd82b71b70a6a843e250e06b541ad524f7

External References:

http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html

Comment 1 Huzaifa S. Sidhpurwala 2016-01-19 08:47:51 UTC

Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1299755]

Comment 2 Huzaifa S. Sidhpurwala 2016-01-19 08:51:50 UTC

CVE request:
http://www.openwall.com/lists/oss-security/2015/09/05/8

No CVE has been assigned by MITRE yet.

Comment 4 Florian Weimer 2016-02-08 10:30:31 UTC

This bug appears to be a duplicate of bug 1260581.