CVE-2021-4034

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-4034
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-4034.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-4034
Related
Published
2022-01-28T20:15:12Z
Modified
2024-11-05T20:50:36.508871Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / policykit-1

Package

Name
policykit-1
Purl
pkg:deb/debian/policykit-1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.105-31+deb11u1

Affected versions

0.*

0.105-31

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / policykit-1

Package

Name
policykit-1
Purl
pkg:deb/debian/policykit-1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.105-31.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / policykit-1

Package

Name
policykit-1
Purl
pkg:deb/debian/policykit-1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.105-31.1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Git / gitlab.freedesktop.org/polkit/polkit

Affected ranges

Type
GIT
Repo
https://gitlab.freedesktop.org/polkit/polkit
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a2bf5c9c83b6ae46cbd5c779d3055bff81ded683

Affected versions

0.*

0.100
0.101
0.102
0.103
0.104
0.105
0.106
0.107
0.108
0.109
0.110
0.111
0.112
0.113
0.114
0.115
0.116
0.117
0.118
0.119
0.120
0.91
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99

Other

POLICY_KIT_0_3
POLICY_KIT_0_4
POLICY_KIT_0_5
POLICY_KIT_0_6
POLICY_KIT_0_7
POLICY_KIT_0_8
POLICY_KIT_0_9
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