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Vulnerability DatabaseCVE-2021-20001

CVE-2021-20001: 
Linux Debian vulnerability analysis and mitigation

Overview

CVE-2021-20001 affects debian-edu-config, a set of configuration files used for the Debian Edu blend. The vulnerability was discovered by Marcel Neumann, Robert Altschaffel, Loris Guba and Dustin Hermann and disclosed in February 2022. The issue affects versions before 2.12.16 and impacts the configuration of user web shares (~/public_html) permissions (Debian Security).

Technical details

The vulnerability stems from insecure permissions configured for user web shares (~/public_html) in the debian-edu-config package. This misconfiguration in the permissions setup could allow unauthorized access to web share directories (Debian Security).

Impact

The vulnerability could result in privilege escalation, allowing attackers to gain elevated access to the system through the insecurely configured web share permissions (Debian Security).

Mitigation and workarounds

The issue has been fixed in multiple Debian releases: version 1.929+deb9u5 for Debian 9 (stretch), version 2.10.65+deb10u8 for Debian 10 (buster), and version 2.11.56+deb11u3 for Debian 11 (bullseye). Users are recommended to upgrade their debian-edu-config packages. For systems requiring PHP functionality in user web shares, administrators should refer to /usr/share/doc/debian-edu-config/README.public_html_with_PHP-CGI+suExec.md (Debian LTS, Debian Security).

Additional resources

Source: This report was generated using AI

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