Amazon Linux 2022 Security Advisory: ALAS-2022-016
Advisory Release Date: 2022-01-26 20:50 Pacific
Advisory Updated Date: 2022-01-26 21:40 Pacific
Severity:
Important
Issue Overview:
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. (CVE-2021-4034)
Affected Packages:
polkit
Issue Correction:
Run dnf update --releasever=2022.0.20220125 polkit to update your system.
New Packages:
aarch64:
polkit-debuginfo-0.117-3.amzn2022.2.aarch64
polkit-libs-debuginfo-0.117-3.amzn2022.2.aarch64
polkit-debugsource-0.117-3.amzn2022.2.aarch64
polkit-devel-0.117-3.amzn2022.2.aarch64
polkit-libs-0.117-3.amzn2022.2.aarch64
polkit-0.117-3.amzn2022.2.aarch64
noarch:
polkit-docs-0.117-3.amzn2022.2.noarch
src:
polkit-0.117-3.amzn2022.2.src
x86_64:
polkit-debuginfo-0.117-3.amzn2022.2.x86_64
polkit-devel-0.117-3.amzn2022.2.x86_64
polkit-libs-debuginfo-0.117-3.amzn2022.2.x86_64
polkit-libs-0.117-3.amzn2022.2.x86_64
polkit-debugsource-0.117-3.amzn2022.2.x86_64
polkit-0.117-3.amzn2022.2.x86_64