CVE-2021-4034
Scores
EPSS
Percentile: 87.8%
CVSS
CVSS Score: 7.8/10
All CVSS Scores
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Local (L)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
Low (L)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Local (L)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Complete
Measures the impact to the confidentiality of information
Integrity Impact
Complete
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Complete
Measures the impact to the availability of the impacted component
Description
A local privilege escalation vulnerability was found on polkit’s pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn’t handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it’ll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.
Scaner-VS 7 — a modern vulnerability management solution
Sources
CWEs
Related Vulnerabilities
Exploits
Exploit ID: CVE-2021-4034
Source: cisa
URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Vulnerable Software (59)
Type: Configuration
Product: libpolkit
Operating System: altlinux
{ "fixed": "0:0.116-alt2.M90P.4"}
Source: redhat
Type: Configuration
Product: libpolkit-devel
Operating System: altlinux
{ "fixed": "0:0.116-alt2.M90P.4"}
Source: redhat
Type: Configuration
Product: libpolkit-gir
Operating System: altlinux
{ "fixed": "0:0.116-alt2.M90P.4"}
Source: redhat
Type: Configuration
Product: libpolkit-gir-devel
Operating System: altlinux
{ "fixed": "0:0.116-alt2.M90P.4"}
Source: redhat
Type: Configuration
Product: policykit-1
Operating System: ubuntu bionic 18.04
{ "fixed": "0.105-20ubuntu0.18.04.6"}
Source: ubuntu
Type: Configuration
Product: policykit-1
Operating System: ubuntu focal 20.04
{ "fixed": "0.105-26ubuntu1.2"}
Source: ubuntu
Type: Configuration
Product: policykit-1
Operating System: ubuntu hirsute 21.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: policykit-1
Operating System: ubuntu impish 21.10
{ "fixed": "0.105-31ubuntu0.1"}
Source: ubuntu
Type: Configuration
Product: policykit-1
Operating System: ubuntu jammy 22.04
{ "fixed": "0.105-31ubuntu1"}
Source: ubuntu
Type: Configuration
Product: policykit-1
Operating System: debian
{ "fixed": "0.105-31.1"}
Source: debian
Type: Configuration
Product: policykit-1
Operating System: astra 1.7.2.5
{ "unaffected": true}
Source: astra
Type: Configuration
Product: policykit-1
Operating System: astra 4.7.2.5
{ "unaffected": true}
Source: astra
Type: Configuration
Product: polkit
Operating System: rhel 6
{ "fixed": "0.96-11.el6_10.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: rhel 7.7
{ "fixed": "0.112-22.el7_7.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: rhel 7.7
{ "fixed": "0.112-22.el7_7.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: rhel 7.7
{ "fixed": "0.112-22.el7_7.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: rhel 8.1
{ "fixed": "0.115-9.el8_1.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: rhel 8.2
{ "fixed": "0.115-11.el8_2.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: rhel 8.4
{ "fixed": "0.115-11.el8_4.2"}
Source: redhat
Type: Configuration
Product: polkit
Operating System: altlinux
{ "fixed": "0:0.116-alt2.M90P.4"}
Source: redhat