Vulnerability Report

CVE-2021-3560

CISA KEV Active

Title: Redhat Virtualization Host

Other

Proof Of Concept

PoC Available for CVE-2021-3560

CWE Category CWE-754
Published Date Feb 16, 2022
Modified Date Nov 06, 2025
Exploit Status Available
Score 7.8 CVSS v3.1
Exploit Probability (EPSS)
9.10%

Vulnerability Summary

CVE-2021-3560: It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Impacted Vendors

F
freedesktop 1
R
redhat 3
O
oracle 1
P
polkit_project 1

Reference Links

http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html https://bugzilla.redhat.com/show_bug.cgi?id=1961710 https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/ http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html https://bugzilla.redhat.com/show_bug.cgi?id=1961710 https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/ https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.2
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-3560 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/50011
View Code
MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.