CVE-2019-19232 : Vulnerability Insights and Analysis

In versions of Sudo up to 1.8.29, an attacker can impersonate a non-existent user by using a numeric uid when invoking sudo. The developer considers this an intentional feature, but it has been disputed.

Understanding CVE-2019-19232

This CVE involves a potential vulnerability in Sudo versions up to 1.8.29 that allows attackers to impersonate non-existent users.

What is CVE-2019-19232?

Sudo versions up to 1.8.29 allow attackers to impersonate non-existent users by using a numeric uid when invoking sudo.
The developer views this as an intentional feature, enabling command execution via sudo as a user not listed in the local password database.

The Impact of CVE-2019-19232

The ability for attackers to impersonate non-existent users could lead to unauthorized access and misuse of privileges.

Technical Details of CVE-2019-19232

This section provides more technical insights into the vulnerability.

Vulnerability Description

Sudo versions up to 1.8.29 allow attackers to impersonate non-existent users by using a numeric uid, which the developer considers an intentional feature.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: Up to 1.8.29

Exploitation Mechanism

Attackers can exploit this vulnerability by using a numeric uid when invoking sudo, allowing them to impersonate non-existent users.

Mitigation and Prevention

To address this vulnerability, certain steps can be taken to mitigate risks and enhance security.

Immediate Steps to Take

Upgrade to Sudo version 1.8.30 or later, where an option to enable or disable this behavior is introduced.

Long-Term Security Practices

Regularly review and update sudo configurations to ensure secure settings.
Implement the principle of least privilege to restrict unnecessary access.

Patching and Updates

Apply patches and updates provided by the software vendor to address this vulnerability.