Bug 730379

Summary:	libresolv is not compiled with the stack protector enabled
Product:	Red Hat Enterprise Linux 6	Reporter:	Steve Grubb <sgrubb>
Component:	glibc	Assignee:	Andreas Schwab <schwab>
Status:	CLOSED ERRATA	QA Contact:	qe-baseos-tools-bugs
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.1	CC:	fweimer, mfranc
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Unspecified
Whiteboard:
Fixed In Version:	glibc-2.12-1.38.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	756453 (view as bug list)		Environment:
Last Closed:	2011-12-06 17:48:02 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:
Bug Blocks:	756453

Description Steve Grubb 2011-08-12 17:13:59 UTC

Description of problem:
The libresolv library is not compiled with the stack protector enabled. Because it talks to remote DNS servers to do lookups, it might be subjected to malformed replies. Although there are no known bugs in this library that are exploitable, it is prudent to make sure we have used protection mechanisms built into the compiler "just in case". Because of network delays and server response times, any overhead created by the stack protector is likely to be unnoticed.

Steps to Reproduce:
1. checksec.sh --file /lib64/libresolv-2.12.so
  
Actual results:
Partial RELRO   No canary found   NX enabled    Dynamic Shared Object 

Expected results:
Partial RELRO   Canary found   NX enabled    Dynamic Shared Object

Comment 3 errata-xmlrpc 2011-12-06 17:48:02 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1526.html