Bug 144518

Summary: CAN-2005-0087 alsa-lib disables stack protection for it's users
Product: Red Hat Enterprise Linux 4 Reporter: Brian Stein <bstein>
Component: alsa-libAssignee: Brian Stein <bstein>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: medium    
Version: 4.0CC: bstevens, dff, mjc, notting
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=important
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-02-15 09:25:07 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: 136452, 142822    
Attachments:
Description Flags
patch to fix this issue none

Description Arjan van de Ven 2005-01-07 21:45:54 UTC 
Description of problem:
 
libasound.so will disable the stack execution protection for all the apps using
it, which is quite a big chunk of our desktop apps.
The cause is a bit of evil code in src/mixer/mixer.c

I will attach a patch to fix this.

Note that this is a rather serious security issue due to the effect of disabling
stack protection (both execshield segment and NX) for a wide range of
applications at once.
Comment 1 Arjan van de Ven 2005-01-07 21:45:54 UTC 
Created attachment 109498 [details]
patch to fix this issue
Comment 7 Mark J. Cox 2005-01-28 11:49:05 UTC 
I'm assigning this issue CAN-2005-0087 as it borderline qualifies for
a CVE name under the definition of "exposure".  Since this has the
potential to disable stack execution protection for a large number of
applications, it's violating a reasonable security stance for the
RHEL4 product.
Comment 8 Mark J. Cox 2005-02-15 09:25:07 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-033.html