CVE-2018-12479 in Open Build Service
Summary
by MITRE
A Improper Input Validation vulnerability in Open Build Service allows remote attackers to cause DoS by specifying crafted request IDs. Affected releases are openSUSE Open Build Service: versions prior to 01b015ca2a320afc4fae823465d1e72da8bd60df.
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Analysis
by VulDB Data Team • 05/23/2023
The vulnerability identified as CVE-2018-12479 represents a critical improper input validation flaw within the Open Build Service platform that exposes systems to remote denial of service attacks. This weakness specifically manifests when the system processes crafted request IDs in a manner that fails to properly validate or sanitize incoming data inputs. The Open Build Service, which serves as a comprehensive build automation framework for openSUSE and other Linux distributions, becomes vulnerable to exploitation when it encounters malformed request identifiers that bypass normal validation procedures. The affected versions prior to the commit hash 01b015ca2a320afc4fae823465d1e72da8bd60df demonstrate a fundamental failure in input sanitization that allows malicious actors to craft specific request parameters designed to disrupt system operations. This vulnerability operates at the application layer and leverages the service's trust in incoming request data without sufficient validation mechanisms to detect potentially harmful inputs.
The technical implementation of this vulnerability stems from inadequate parameter validation within the request processing pipeline of the Open Build Service. When a remote attacker submits a specially crafted request ID, the system fails to properly validate the input against expected formats or constraints, allowing the malformed data to propagate through the application stack. This processing failure can lead to resource exhaustion, infinite loops, or other operational disruptions that effectively render the service unavailable to legitimate users. The vulnerability specifically targets the request handling mechanism where identifiers are used to track and manage build processes, making it particularly dangerous as it can impact the core functionality of the entire build automation system. The lack of proper input validation creates a pathway for attackers to manipulate the service's internal state through carefully constructed request parameters that exploit the absence of defensive measures.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire build infrastructure of affected organizations. Remote attackers can leverage this weakness to systematically deny service to legitimate users by submitting malicious request IDs that cause the system to consume excessive resources or enter unstable states. The vulnerability's remote exploitability means that attackers do not require local access or elevated privileges to cause significant disruption, making it particularly dangerous in production environments where build services are critical for software development workflows. Organizations relying on Open Build Service for their continuous integration and delivery processes face potential delays in software releases and development cycles when this vulnerability is exploited. The DoS conditions can persist until manual intervention occurs or the system is restarted, potentially causing cascading effects throughout dependent services and development teams that rely on the build platform.
Mitigation strategies for CVE-2018-12479 require immediate implementation of input validation controls and system updates to address the root cause of the vulnerability. Organizations should prioritize upgrading to versions of Open Build Service that contain the fix corresponding to the commit hash 01b015ca2a320afc4fae823465d1e72da8bd60df or later releases that incorporate proper input sanitization measures. System administrators should implement robust input validation routines that enforce strict format checking and length limitations for all request identifiers, particularly those used in build tracking and process management. The implementation of rate limiting and request monitoring mechanisms can help detect and prevent exploitation attempts by identifying abnormal request patterns. Additionally, organizations should conduct thorough security assessments of their build infrastructure to identify other potential input validation weaknesses that may present similar attack vectors. Network-level defenses including firewalls and intrusion detection systems can provide additional layers of protection by monitoring for suspicious request patterns that match the characteristics of this vulnerability. This remediation approach aligns with common security practices outlined in the CWE catalog under improper input validation categories and follows ATT&CK framework techniques for command and control operations that exploit input validation flaws.