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CVE-2022-2735

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a...

7.8 HighFix available

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.32%Down 0.6 points since Sep 7, 2022
90%50%10%1%

What each source reports

NVD Score used 7.8

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
CVE-2022-2735
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-276
Updated
2026-11-02
CVE List No score

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
CVE-2022-2735
Weakness
CWE-276
Updated
2026-11-02
EUVDEUVD-2022-34977 No score

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
EUVD-2022-34977
Updated
2026-11-03
GitHub AdvisoriesGHSA-7xr9-rmm4-cq6v 7.8

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a...

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
GHSA-7xr9-rmm4-cq6v
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-276
Updated
2026-11-02
OSVDEBIAN-CVE-2022-2735 7.8

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
DEBIAN-CVE-2022-2735
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVOESA-2022-1961 7.8

pcs security update

Security Fix(es):

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.(CVE-2022-2735)

Record
OESA-2022-1961
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 11 moreShow less
OSVRHSA-2022:6312 8.4

Red Hat Security Advisory: pcs security update

Record
RHSA-2022:6312
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2022:6313 8.4

Red Hat Security Advisory: pcs security update

Record
RHSA-2022:6313
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2022:6314 8.4

Red Hat Security Advisory: pcs security update

Record
RHSA-2022:6314
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2022:6341 8.4

Red Hat Security Advisory: pcs security update

Record
RHSA-2022:6341
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2022:6313 8.4

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • pcs: obtaining an authentication token for hacluster user could lead to privilege escalation (CVE-2022-2735)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2022:6313
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2022:6314 8.4

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • pcs: obtaining an authentication token for hacluster user could lead to privilege escalation (CVE-2022-2735)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2022:6314
CVSS 3.1
8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2022-2735 7.8

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
UBUNTU-CVE-2022-2735
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVALSA-2022:6313 No score

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • pcs: obtaining an authentication token for hacluster user could lead to privilege escalation (CVE-2022-2735)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2022:6313
Updated
2026-11-02
OSVALSA-2022:6314 No score

Important: pcs security update

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es):

  • pcs: obtaining an authentication token for hacluster user could lead to privilege escalation (CVE-2022-2735)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2022:6314
Updated
2026-11-02
OSV No score

A vulnerability was found in the PCS project. This issue occurs due to incorrect permissions on a Unix socket used for internal communication between PCS daemons. A privilege escalation could happen by obtaining an authentication token for a hacluster user. With the "hacluster" token, this flaw allows an attacker to have complete control over the cluster managed by PCS.

Record
CVE-2022-2735
Weakness
CWE-276
Updated
2026-11-02
OSVUSN-7614-1 No score

pcs vulnerabilities

Cedric Buissart discovered that pcs did not correctly handle certain parameters. An attacker could possibly use this issue to leak sensitive information or elevate their privileges. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-1086)

Ondrej Mular discovered that pcs did not correctly handle Unix socket permissions. An attacker could possibly use this issue to elevate their privileges. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-2735)

It was discovered that pcs did not correctly handle PAM authentication. An attacker could possibly use this issue to bypass authentication mechanisms. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-1049)

It was discovered that pcs did not correctly handle the validation of Node names. An attacker could possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-2661)

Record
USN-7614-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
pcs
AlmaLinux:9
 before 0.11.1-10.el9_0.2
0.11.1-10.el9_0.2
pcs-snmp
AlmaLinux:9
 before 0.11.1-10.el9_0.2
0.11.1-10.el9_0.2
pcs
AlmaLinux:8
 before 0.10.12-6.el8_6.2.alma
0.10.12-6.el8_6.2.alma
pcs-snmp
AlmaLinux:8
 before 0.10.12-6.el8_6.2.alma
0.10.12-6.el8_6.2.alma
pcs
Debian:12
 before 0.11.3-2
0.11.3-2
pcs
Debian:13
 before 0.11.3-2
0.11.3-2
pcs
Debian:14
 before 0.11.3-2
0.11.3-2
pcs
Debian:11
From an advisory covering 2 CVEs
 before 0.10.8-1+deb11u1, plus listed versions
0.10.8-1
0.10.8-1+deb11u1
pcs
openEuler:20.03-LTS-SP1
 before 0.10.5-3.oe1
0.10.5-3.oe1
pcs
openEuler:20.03-LTS-SP3
 before 0.10.5-3.oe1
0.10.5-3.oe1
Show 24 moreShow less
Affected packages
PackageAffectedFixed
pcs
openEuler:22.03-LTS
 before 0.10.8-4.oe2203
0.10.8-4.oe2203
pcs
Red Hat:rhel_eus:8.4::highavailability
 before 0:0.10.8-1.el8_4.2
0:0.10.8-1.el8_4.2
pcs-snmp
Red Hat:rhel_eus:8.4::highavailability
 before 0:0.10.8-1.el8_4.2
0:0.10.8-1.el8_4.2
pcs
Red Hat:rhel_eus:8.4::resilientstorage
 before 0:0.10.8-1.el8_4.2
0:0.10.8-1.el8_4.2
pcs-snmp
Red Hat:rhel_eus:8.4::resilientstorage
 before 0:0.10.8-1.el8_4.2
0:0.10.8-1.el8_4.2
pcs
Red Hat:enterprise_linux:9::highavailability
 before 0:0.11.1-10.el9_0.2
0:0.11.1-10.el9_0.2
pcs-snmp
Red Hat:enterprise_linux:9::highavailability
 before 0:0.11.1-10.el9_0.2
0:0.11.1-10.el9_0.2
pcs
Red Hat:enterprise_linux:9::resilientstorage
 before 0:0.11.1-10.el9_0.2
0:0.11.1-10.el9_0.2
pcs-snmp
Red Hat:enterprise_linux:9::resilientstorage
 before 0:0.11.1-10.el9_0.2
0:0.11.1-10.el9_0.2
pcs
Red Hat:enterprise_linux:8::highavailability
 before 0:0.10.12-6.el8_6.2
0:0.10.12-6.el8_6.2
pcs-snmp
Red Hat:enterprise_linux:8::highavailability
 before 0:0.10.12-6.el8_6.2
0:0.10.12-6.el8_6.2
pcs
Red Hat:enterprise_linux:8::resilientstorage
 before 0:0.10.12-6.el8_6.2
0:0.10.12-6.el8_6.2
pcs-snmp
Red Hat:enterprise_linux:8::resilientstorage
 before 0:0.10.12-6.el8_6.2
0:0.10.12-6.el8_6.2
pcs
Red Hat:rhel_eus:8.2::highavailability
 before 0:0.10.4-6.el8_2.3
0:0.10.4-6.el8_2.3
pcs-snmp
Red Hat:rhel_eus:8.2::highavailability
 before 0:0.10.4-6.el8_2.3
0:0.10.4-6.el8_2.3
pcs
Red Hat:rhel_eus:8.2::resilientstorage
 before 0:0.10.4-6.el8_2.3
0:0.10.4-6.el8_2.3
pcs-snmp
Red Hat:rhel_eus:8.2::resilientstorage
 before 0:0.10.4-6.el8_2.3
0:0.10.4-6.el8_2.3
pcs
Rocky Linux:9
 before 0:0.11.1-10.el9_0.2
0:0.11.1-10.el9_0.2
pcs
Rocky Linux:8
 before 0:0.10.12-6.el8_6.2
0:0.10.12-6.el8_6.2
pcs
Ubuntu:Pro:16.04:LTS
 before 0.9.149-1ubuntu1.1+esm1, plus listed versions
0.9.149-10.9.149-1ubuntu10.9.149-1ubuntu1.1
0.9.149-1ubuntu1.1+esm1
pcs
Ubuntu:Pro:22.04:LTS
 before 0.10.11-2ubuntu3+esm1, plus listed versions
0.10.8-1ubuntu10.10.11-2ubuntu20.10.11-2ubuntu3
0.10.11-2ubuntu3+esm1
pcs
Ubuntu:Pro:16.04:LTS
From an advisory covering 4 CVEs
 before 0.9.149-1ubuntu1.1+esm1, plus listed versions
0.9.149-10.9.149-1ubuntu10.9.149-1ubuntu1.1
0.9.149-1ubuntu1.1+esm1
pcs
Ubuntu:Pro:20.04:LTS
From an advisory covering 4 CVEs
 before 0.10.4-3ubuntu0.1~esm1, plus listed versions
0.10.2-10.10.4-20.10.4-2ubuntu10.10.4-3
0.10.4-3ubuntu0.1~esm1
pcs
Ubuntu:Pro:22.04:LTS
From an advisory covering 4 CVEs
 before 0.10.11-2ubuntu3+esm1, plus listed versions
0.10.8-1ubuntu10.10.11-2ubuntu20.10.11-2ubuntu3
0.10.11-2ubuntu3+esm1

History

History
RecordedChangedSources
affected, factsOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-2735 is a high vulnerability (CVSS 7.8) in Clusterlabs Pcs, published September 1, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. Fixed in pcs 0.11.1-10.el9_0.2.

References

Show 27 moreShow less
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