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Date: Wed, 23 May 2018 06:32:23 -0700
From: Qualys Security Advisory <>
Subject: Re: Qualys Security Advisory - Procps-ng Audit Report

Hi all,

As a follow-up to our procps-ng advisory, below are the answers to some
frequently asked questions that you may find useful.

> - which is the first version with the fixes, does it include all of the
> fixes (and if not, what is it missing and are those missing fixes
> important to have?), and where to download it?

Procps-ng 3.3.15 has been released and includes most of our patches; it
is available at:

The patches that are missing from procps-ng 3.3.15 are:

- 7 low-priority patches (0120-0126), which have not yet been validated
  by upstream;

- most of our patches for top, which unfortunately have been reverted by
  top's author; for example:

> Can you let us know which patches the CVEs align with as it will
> make chasing all of this down a lot easier, thanks!

The patch for CVE-2018-1122 is:

The patch for CVE-2018-1123 is:

The patch for CVE-2018-1124 is:

The patch for CVE-2018-1125 is:

The patch for CVE-2018-1126 is:

The kernel patch for CVE-2018-1120 is:

There is currently no patch for CVE-2018-1121, because no satisfactory
solution (secure and efficient) has been found. Please feel free to
suggest ideas here!

> - which versions are vulnerable?

We did not try to track down the first vulnerable version, but we had a
quick look at procps 3.0.0 (from October 2002) and it was already
vulnerable to the 5 CVEs.

> - which version was audited?

We audited procps-ng 3.3.12 (the version used by many stable
distributions), but we probably ended up reading most of the master
branch too while writing the patches.

> what testing have you done?

Because procps-ng is a critical package, and because 126 patches
introduce significant changes, here is what we did to minimize the

- we were two to perform the audit, and we decided to both write the
  most important patches, independently; the final patches are the
  result of this double-work, which clearly avoided a few bugs;

- we ran procps-ng's test-suite ("make check") after each change;

- we manually ran some tests after each major change, to make sure that
  the code-path leading to the change is not broken, and to make sure
  that the change actually fixes the issue;

- we started sending our patches to upstream on March 30 (for reviewing
  and testing), long before we contacted linux-distros@;

- we contacted linux-distros@ on May 4, and were asked for an embargo
  extension (for more time to review and test the patches), so we set
  the Coordinated Release Date to May 17, 17:00 UTC (13 days -- almost
  the maximum embargo, but we wanted to avoid releasing on a Friday).

We are at your disposal for questions, comments, and further
discussions. We thank Solar Designer and Kurt Seifried for their help!
With best regards,

the Qualys Security Advisory team

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