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Debian Security Advisory 4791-1

Debian Security Advisory 4791-1
Posted Nov 28, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4791-1 - Ken Gaillot discovered a vulnerability in the Pacemaker cluster group, the ACL restrictions could be bypassed via unrestricted IPC communication, resulting in cluster-wide arbitrary code execution with root privileges.

tags | advisory, arbitrary, root, code execution
systems | linux, debian
advisories | CVE-2020-25654
SHA-256 | ea258fb8e2dd23dc2bd8cbfc14d1af322b234d32a12d5b7453873e66f8770b6b

Debian Security Advisory 4791-1

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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
- -------------------------------------------------------------------------

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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