[<prev] [next>] [day] [month] [year] [list]
Date: Thu, 11 Mar 2021 17:19:44 +1000
From: Wade Mealing <wmealing@...hat.com>
To: oss-security@...ts.openwall.com
Subject: CVE-2021-20269: kexec-tools: incorrect permissions on
vmcore-dmesg.txt file
Gday,
A flaw was found in the kexec-tools where it made the incorrect permissions
on the vmcore-dmesg.txt extracted from the vmcore of a previous kernel
panic. It is possible that this could be used to leak kernel internal
information from a previous execution if it was output to the ring buffer
or part of the panic backtrace. An unprivileged user with a local account
can use this to extract kernel internal information resulting in an
information leak.
TLDR: The vmcore-dmesg.txt is created world readable and should not be.
Red Hat Bugzilla:
http://bugzilla.redhat.com/CVE-2021-20269
Thank you.
--
Wade Mealing
Product Security - Kernel, RHCE
Red Hat
<https://www.redhat.com>
wmealing@...hat.com
<https://red.ht/sig>
TRIED. TESTED. TRUSTED. <https://redhat.com/trusted>
secalert@...hat.com for urgent response
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
