Debian DSA-4791-1 : pacemaker - security update

high Nessus Plugin ID 142920


The remote Debian host is missing a security-related update.


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.


Upgrade the pacemaker packages.

For the stable distribution (buster), this problem has been fixed in version 2.0.1-5+deb10u1.

See Also

Plugin Details

Severity: High

ID: 142920

File Name: debian_DSA-4791.nasl

Version: 1.4

Type: local

Agent: unix

Published: 11/17/2020

Updated: 2/8/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2020-25654


Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:pacemaker, cpe:/o:debian:debian_linux:10.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2020

Vulnerability Publication Date: 11/24/2020

Reference Information

CVE: CVE-2020-25654

DSA: 4791