CVE-2019-10136 Explained : Impact and Mitigation

Researchers discovered a security vulnerability in Spacewalk versions up to 2.9 that allows attackers to manipulate client token checksums, extending session validity.

Understanding CVE-2019-10136

Spacewalk up to version 2.9 is affected by a vulnerability that enables attackers to exploit client token checksum miscalculations.

What is CVE-2019-10136?

The vulnerability in Spacewalk versions up to 2.9 allows attackers with expired authenticated headers to manipulate specific digits, extending session validity without altering the checksum.

The Impact of CVE-2019-10136

Base Score: 4.3 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Vector String: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Technical Details of CVE-2019-10136

Vulnerability Description

The vulnerability in Spacewalk versions up to 2.9 allows attackers to extend session validity by manipulating client token checksums.

Affected Systems and Versions

Product: Spacewalk
Vendor: spacewalkproject
Affected Versions: Spacewalk all through 2.9

Exploitation Mechanism

Attackers with expired authenticated headers can exploit the vulnerability by manipulating specific digits to extend session validity without altering the checksum.

Mitigation and Prevention

Immediate Steps to Take

Update Spacewalk to version 2.10 or later to mitigate the vulnerability.
Monitor and validate session activities for any suspicious behavior.

Long-Term Security Practices

Regularly review and update security configurations and policies.
Conduct security training to educate users on identifying and reporting suspicious activities.

Patching and Updates

Apply patches and updates provided by Spacewalk to address the vulnerability.