CVE-2014-8126 in HTCondor
Summary
by MITRE
The scheduler in HTCondor before 8.2.6 allows remote authenticated users to execute arbitrary code.
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Analysis
by VulDB Data Team • 12/10/2024
The vulnerability identified as CVE-2014-8126 represents a critical security flaw in HTCondor's job scheduling component that affects versions prior to 8.2.6. HTCondor is a distributed computing framework widely used in high-performance computing environments for job scheduling and resource management across clusters of computers. This vulnerability specifically targets the scheduler module which is responsible for managing job execution and resource allocation within the system. The flaw enables remote authenticated users to escalate their privileges and execute arbitrary code on systems running vulnerable versions of HTCondor.
The technical implementation of this vulnerability stems from inadequate input validation and privilege escalation mechanisms within the scheduler's job submission and execution handling processes. Attackers who have authenticated access to the HTCondor system can exploit this flaw by crafting specially formatted job submissions that manipulate the scheduler's internal state. This manipulation allows them to bypass normal access controls and execute malicious code with elevated privileges. The vulnerability is particularly dangerous because it leverages the legitimate authentication mechanisms of the system, making it difficult to detect through standard network monitoring approaches. The flaw operates by exploiting a weakness in how the scheduler processes certain job attributes and execution parameters, potentially allowing attackers to inject malicious commands that get executed within the context of the scheduler process.
The operational impact of CVE-2014-8126 extends beyond simple privilege escalation, as it can lead to complete system compromise and unauthorized access to sensitive data. Organizations using vulnerable HTCondor installations face significant risks including data breaches, system infiltration, and potential disruption of critical computing operations. The vulnerability can be exploited by attackers who have gained legitimate user credentials, making it particularly concerning for environments where multiple users have access to the system. This flaw undermines the fundamental security assumptions of the distributed computing environment, as it allows attackers to execute arbitrary code without requiring physical access or additional authentication mechanisms. The potential for lateral movement within the network increases significantly since compromised systems can be used as launching points for further attacks against other network resources.
Mitigation strategies for CVE-2014-8126 primarily focus on immediate patching of affected HTCondor installations to version 8.2.6 or later, which contains the necessary security fixes. Organizations should also implement network segmentation and access controls to limit the scope of potential exploitation, ensuring that only authorized users have access to the scheduler components. Additional defensive measures include monitoring for unusual job submission patterns, implementing strict authentication controls, and conducting regular security audits of the distributed computing environment. The vulnerability aligns with CWE-20, which addresses "Improper Input Validation," and represents a classic example of how insufficient validation of user inputs can lead to privilege escalation attacks. From an ATT&CK perspective, this vulnerability maps to techniques involving privilege escalation and execution of malicious code, specifically targeting the scheduler component as a critical system service that requires enhanced protection measures. Organizations should also consider implementing network-based intrusion detection systems that can identify suspicious job submission patterns and alert security teams to potential exploitation attempts.