Bug 1710869 - many KDE processes have rwx memory mappings
Summary: many KDE processes have rwx memory mappings
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: kf5-kded
Version: 32
Hardware: x86_64
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Daniel Vrátil
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-05-16 13:10 UTC by Laurent Bonnaud
Modified: 2021-05-25 15:01 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2021-05-25 15:01:09 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Laurent Bonnaud 2019-05-16 13:10:34 UTC
Description of problem:

As a defense against machine code injection made possible by buffer overflow bugs, most Linux distributions have worked over the years to remove as many rwx memory mappings as possible in processes.

I checked this on several of my systems and unfortunately I found that many KDE processes do have rwx memory mappings.

I chose to report this bug against the kded package because it is one of the most fundamental affected KDE process I found. However, the problem seems to be more general in KDE. I apologize in advance for not finding a better software package to report this problem.

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

Fedora 30 packages updated today.

How reproducible:

always

Steps to Reproduce:
1. Log in Plasma
2. Run the following command:

$ grep rwx /proc/$(pidof kded5)/maps

Actual results:

$ grep rwx /proc/$(pidof kded5)/maps
7f68d7c2a000-7f68d7c3a000 rwxp 00000000 00:00 0

Expected results:

No output

Additional info:

According to comments in this bug report:
  https://bugs.kde.org/show_bug.cgi?id=407496
other Linux distributions do not have the same problem.

Comment 1 Ben Cotton 2020-04-30 21:59:54 UTC
This message is a reminder that Fedora 30 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora 30 on 2020-05-26.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
Fedora 'version' of '30'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 30 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora, you are encouraged  change the 'version' to a later Fedora 
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events. Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

Comment 2 Laurent Bonnaud 2020-05-01 16:12:38 UTC
The problem is still there in Fedora 32.

Comment 3 Fedora Program Management 2021-04-29 15:55:41 UTC
This message is a reminder that Fedora 32 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora 32 on 2021-05-25.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
Fedora 'version' of '32'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 32 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora, you are encouraged  change the 'version' to a later Fedora 
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events. Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

Comment 4 Ben Cotton 2021-05-25 15:01:09 UTC
Fedora 32 changed to end-of-life (EOL) status on 2021-05-25. Fedora 32 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.


Note You need to log in before you can comment on or make changes to this bug.