CVE-2021-4034

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
redhatCNA
---
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CVEADP
---
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CISA-ADPADP
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 99%
VendorProductVersion
polkit_projectpolkit
𝑥
< 121
redhatenterprise_linux_server_update_services_for_sap_solutions
7.6
redhatenterprise_linux_server_update_services_for_sap_solutions
7.7
redhatenterprise_linux
8.0
redhatenterprise_linux_desktop
7.0
redhatenterprise_linux_eus
8.2
redhatenterprise_linux_for_ibm_z_systems
7.0
redhatenterprise_linux_for_ibm_z_systems
8.0
redhatenterprise_linux_for_ibm_z_systems_eus
8.2
redhatenterprise_linux_for_ibm_z_systems_eus
8.4
redhatenterprise_linux_for_power_big_endian
7.0
redhatenterprise_linux_for_power_little_endian
7.0
redhatenterprise_linux_for_power_little_endian
8.0
redhatenterprise_linux_for_power_little_endian_eus
8.1
redhatenterprise_linux_for_power_little_endian_eus
8.2
redhatenterprise_linux_for_power_little_endian_eus
8.4
redhatenterprise_linux_for_scientific_computing
7.0
redhatenterprise_linux_server
6.0
redhatenterprise_linux_server
7.0
redhatenterprise_linux_server_aus
7.3
redhatenterprise_linux_server_aus
7.4
redhatenterprise_linux_server_aus
7.6
redhatenterprise_linux_server_aus
7.7
redhatenterprise_linux_server_aus
8.2
redhatenterprise_linux_server_aus
8.4
redhatenterprise_linux_server_eus
8.4
redhatenterprise_linux_server_tus
7.6
redhatenterprise_linux_server_tus
7.7
redhatenterprise_linux_server_tus
8.2
redhatenterprise_linux_server_tus
8.4
redhatenterprise_linux_server_update_services_for_sap_solutions
8.1
redhatenterprise_linux_server_update_services_for_sap_solutions
8.2
redhatenterprise_linux_server_update_services_for_sap_solutions
8.4
redhatenterprise_linux_workstation
7.0
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
20.04
canonicalubuntu_linux
21.10
suseenterprise_storage
7.0
suselinux_enterprise_high_performance_computing
15.0:sp2
susemanager_proxy
4.1
susemanager_server
4.1
oraclehttp_server
12.2.1.3.0
oraclehttp_server
12.2.1.4.0
oraclezfs_storage_appliance_kit
8.8
siemenssinumerik_edge
𝑥
< 3.3.0
siemensscalance_lpe9403_firmware
𝑥
< 2.0
starwindsoftwarecommand_center
1.0:update3_build5871
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
policykit-1
bullseye (security)
0.105-31+deb11u1
fixed
bullseye
0.105-31+deb11u1
fixed
bookworm
122-3
fixed
sid
125-2
fixed
trixie
125-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
policykit-1
jammy
Fixed 0.105-31ubuntu1
released
impish
Fixed 0.105-31ubuntu0.1
released
hirsute
ignored
focal
Fixed 0.105-26ubuntu1.2
released
bionic
Fixed 0.105-20ubuntu0.18.04.6
released
xenial
Fixed 0.105-14.1ubuntu0.5+esm1
released
trusty
Fixed 0.105-4ubuntu3.14.04.6+esm1
released
References