CVE-2016-9605 in Cobbler
Summary
by MITRE
A flaw was found in cobbler software component version 2.6.11-1. It suffers from an invalid parameter validation vulnerability, leading the arbitrary file reading. The flaw is triggered by navigating to a vulnerable URL via cobbler-web on a default installation.
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Analysis
by VulDB Data Team • 05/04/2023
The vulnerability identified as CVE-2016-9605 resides within the cobbler software component version 2.6.11-1, representing a critical security flaw that compromises the integrity of the system through improper parameter validation mechanisms. This vulnerability specifically affects the cobbler-web interface, which serves as the primary web-based management tool for the cobbler provisioning system. The flaw manifests when users navigate to specific URLs within the web interface, making it accessible through standard web browser interactions without requiring specialized tools or advanced exploitation techniques. The underlying issue stems from insufficient input validation that allows malicious parameters to bypass normal security controls and access restricted file systems.
The technical implementation of this vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness in software design. When cobbler-web processes user requests through the web interface, it fails to properly sanitize or validate incoming parameters that specify file paths or resource locations. This validation failure creates an arbitrary file reading condition where attackers can manipulate URL parameters to traverse the file system and access files that should remain protected or restricted. The vulnerability is particularly dangerous because it operates on default installation configurations, meaning that organizations deploying cobbler without additional security hardening measures are immediately at risk. The flaw essentially allows unauthorized access to sensitive system files, configuration data, and potentially other critical resources that the web interface should normally restrict access to.
The operational impact of CVE-2016-9605 extends beyond simple information disclosure, as it provides attackers with the capability to extract potentially sensitive configuration data, system credentials, or other valuable information from the compromised system. This arbitrary file reading vulnerability enables attackers to gain insights into the internal workings of the provisioning infrastructure, potentially revealing network configurations, system layouts, or other intelligence that could facilitate further attacks. The vulnerability's accessibility through standard web navigation means that even unskilled attackers can exploit this flaw without requiring deep technical knowledge of the underlying system architecture. Organizations using cobbler for automated provisioning and deployment operations face significant risk, as this vulnerability could expose the entire infrastructure to unauthorized access and manipulation.
Mitigation strategies for CVE-2016-9605 should focus on immediate patching of the cobbler software to version 2.6.12 or later, which contains the necessary fixes for the parameter validation issues. Additionally, implementing network-level restrictions such as firewall rules to limit access to the cobbler-web interface can significantly reduce the attack surface. Organizations should also consider implementing web application firewalls specifically designed to detect and prevent parameter manipulation attacks, as these tools can provide an additional layer of protection against similar vulnerabilities. The remediation process should include comprehensive testing to ensure that the patched version maintains all necessary functionality while eliminating the arbitrary file reading capability. Security monitoring should be enhanced to detect unusual access patterns or attempts to exploit similar vulnerabilities within the provisioning infrastructure, as this vulnerability may indicate broader security weaknesses in the system's access control mechanisms.