CVE-2022-0563 : Security Advisory and Response
CVE-2022-0563 describes a flaw in util-linux versions prior to 2.37.4 that allows unprivileged users to read root-owned files, potentially leading to privilege escalation. Learn how to mitigate this security risk.
A flaw was found in the util-linux chfn and chsh utilities when compiled with Readline support, potentially leading to privilege escalation.
Understanding CVE-2022-0563
This CVE describes a vulnerability in util-linux versions prior to 2.37.4 that allows an unprivileged user to read root-owned files, resulting in potential privilege escalation.
What is CVE-2022-0563?
The vulnerability in the util-linux chfn and chsh utilities compiled with Readline support allows an unprivileged user to access root-owned files, potentially escalating their privileges.
The Impact of CVE-2022-0563
Exploiting this vulnerability could lead to unauthorized access to sensitive system files and potentially enable attackers to elevate their privileges on the system.
Technical Details of CVE-2022-0563
This section provides more technical details about the vulnerability.
Vulnerability Description
The Readline library's handling of the "INPUTRC" environment variable in util-linux versions prior to 2.37.4 can allow an unprivileged user to read root-owned files.
Affected Systems and Versions
Affected systems include those running util-linux versions prior to 2.37.4 with Readline support enabled.
Exploitation Mechanism
By manipulating the "INPUTRC" environment variable, an attacker can trigger an error message that leaks data from root-owned files, potentially aiding in privilege escalation.
Mitigation and Prevention
To mitigate the risks associated with CVE-2022-0563, follow these guidelines.
Immediate Steps to Take
Update util-linux to version 2.37.4 or later to address this vulnerability. Additionally, consider restricting access to sensitive system files.
Long-Term Security Practices
Regularly update software packages to receive the latest security patches and monitor system logs for any unusual activities that may indicate unauthorized access.
Patching and Updates
Stay up to date with security advisories and patches released by the vendor to ensure that your systems are protected against known vulnerabilities.