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AUSCERT External Security Bulletin Redistribution
ESB-2020.4052
pacemaker security update
16 November 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: pacemaker
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Root Compromise -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
Unauthorised Access -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-25654
Reference: ESB-2020.4029
ESB-2020.3754
ESB-2020.3745
ESB-2020.3721
Original Bulletin:
http://www.debian.org/security/2020/dsa-4791
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Debian Security Advisory DSA-4791-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
November 13, 2020 https://www.debian.org/security/faq
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Package : pacemaker
CVE ID : CVE-2020-25654
Debian Bug : 973254
Ken Gaillot discovered a vulnerability in the Pacemaker cluster
resource manager: If ACLs were configured for users in the "haclient"
group, the ACL restrictions could be bypassed via unrestricted IPC
communication, resulting in cluster-wide arbitrary code execution with
root privileges.
If the "enable-acl" cluster option isn't enabled, members of the
"haclient" group can modify Pacemaker's Cluster Information Base without
restriction, which already gives them these capabilities, so there is
no additional exposure in such a setup.
For the stable distribution (buster), this problem has been fixed in
version 2.0.1-5+deb10u1.
We recommend that you upgrade your pacemaker packages.
For the detailed security status of pacemaker please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/pacemaker
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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