CVE-2019-12875 : What You Need to Know

Alpine Linux abuild through version 3.4.0 allows an unprivileged member of the abuild group to exploit a vulnerability, potentially leading to the acceptance of an untrusted package.

Understanding CVE-2019-12875

This CVE involves a security issue in Alpine Linux abuild versions up to 3.4.0 that enables unauthorized members to introduce untrusted packages.

What is CVE-2019-12875?

An individual without special privileges within the abuild group can exploit a vulnerability in Alpine Linux abuild versions up to 3.4.0. This vulnerability allows the unauthorized member to introduce an untrusted package by utilizing the --keys-dir option, leading to the acceptance of an untrusted signing key.

The Impact of CVE-2019-12875

The vulnerability could potentially allow malicious actors to introduce compromised packages into the system, compromising its integrity and security.

Technical Details of CVE-2019-12875

Alpine Linux abuild through version 3.4.0 is susceptible to exploitation by unauthorized users within the abuild group.

Vulnerability Description

The vulnerability allows an unprivileged member of the abuild group to add an untrusted package via a --keys-dir option, resulting in the acceptance of an untrusted signing key.

Affected Systems and Versions

Alpine Linux abuild versions up to 3.4.0

Exploitation Mechanism

Unauthorized members of the abuild group can exploit the vulnerability by utilizing the --keys-dir option to introduce untrusted packages.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-12875.

Immediate Steps to Take

Update Alpine Linux abuild to a patched version that addresses the vulnerability.
Restrict access to the --keys-dir option to authorized users only.

Long-Term Security Practices

Regularly review and update access controls and permissions within the abuild group.
Conduct security training to educate users on the risks of introducing untrusted packages.

Patching and Updates

Apply patches and updates provided by Alpine Linux to mitigate the vulnerability and enhance system security.