Bug 973499 - programs in par2cmdline package have an executable stack
Summary: programs in par2cmdline package have an executable stack
Alias: None
Product: Fedora
Classification: Fedora
Component: par2cmdline (Show other bugs)
(Show other bugs)
Version: 19
Hardware: Unspecified Unspecified
Target Milestone: ---
Assignee: Erik van Pienbroek
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2013-06-12 04:43 UTC by Dhiru Kholia
Modified: 2014-03-25 03:44 UTC (History)
2 users (show)

Fixed In Version: par2cmdline-0.4.tbb.20100203-16.fc19
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-06-29 18:27:49 UTC
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
this should get rid of executable stack (7.03 KB, text/x-rpm-spec)
2013-06-12 04:44 UTC, Dhiru Kholia
no flags Details
this should get rid of executable stack (1.80 KB, patch)
2013-06-12 04:45 UTC, Dhiru Kholia
no flags Details | Diff

Description Dhiru Kholia 2013-06-12 04:43:14 UTC
Description of problem:

Many programs in par2cmdline package have an executable stack. 

"This makes it susceptible to stack based exploits should another weakness be found in the affected programs" (Steve Grubb).

Version-Release number of selected component (if applicable):


How reproducible:

You can use following programs to check if a package is hardened:




Steps to Reproduce:

Get scanner.py from https://github.com/kholia/checksec

$ ./scanner.py par2cmdline-0.4.tbb.20100203-11.fc18.x86_64.rpm

Notice "NX=Disabled" field.

Comment 1 Dhiru Kholia 2013-06-12 04:44:44 UTC
Created attachment 759942 [details]
this should get rid of executable stack

Comment 2 Dhiru Kholia 2013-06-12 04:45:15 UTC
Created attachment 759943 [details]
this should get rid of executable stack

Comment 3 Dhiru Kholia 2013-06-12 04:48:17 UTC
Modified .spec file + a tiny patch to fix this problem are attached.

par2cmdline-enable-NX.patch uses the same technique as used in the LAME package to fix the executable stack problem.

After applying the patch, I have verified that the automated self-tests and manual tests pass.

Comment 4 Dhiru Kholia 2013-06-14 04:00:33 UTC
Hi Erik,

Is there any progress on this bug? Do the attached "patches" work?

Comment 5 Erik van Pienbroek 2013-06-14 16:50:01 UTC
Thank you very much for the patch!
I'm going to push updated packages soon

Comment 6 Fedora Update System 2013-06-15 18:05:33 UTC
par2cmdline-0.4.tbb.20100203-16.fc19 has been submitted as an update for Fedora 19.

Comment 7 Fedora Update System 2013-06-16 19:21:22 UTC
Package par2cmdline-0.4.tbb.20100203-16.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing par2cmdline-0.4.tbb.20100203-16.fc19'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 8 Fedora Update System 2013-06-29 18:27:49 UTC
par2cmdline-0.4.tbb.20100203-16.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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