CVE-2014-0470 in super
Summary
by MITRE
super.c in Super 3.30.0 does not check the return value of the setuid function when the -F flag is set, which allows local users to gain privileges via unspecified vectors, aka an RLIMIT_NPROC attack.
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Analysis
by VulDB Data Team • 05/12/2026
The vulnerability identified as CVE-2014-0470 resides within the super command utility version 3.30.0, specifically in the super.c source file where improper error handling leads to privilege escalation opportunities. This flaw manifests when the -F flag is utilized during execution, creating a dangerous condition where the setuid function's return value is ignored. The absence of proper validation allows local attackers to exploit this oversight and elevate their privileges within the system. The vulnerability is categorized under CWE-252, which represents an unchecked return value, a common weakness that occurs when a function's return code is not properly examined for errors. This particular issue represents a classic example of how seemingly minor coding oversights can create significant security implications, particularly in privilege management contexts where system integrity relies on proper access controls.
The technical mechanism behind this vulnerability involves the super command's handling of user privileges when operating with the -F flag. When setuid is invoked, it attempts to change the user ID of the running process to the target user, typically root for privilege escalation purposes. However, when the return value from setuid is not checked, the program continues execution regardless of whether the privilege change was successful or not. This creates a scenario where a local user can potentially manipulate the execution flow to gain elevated privileges through unspecified vectors that leverage the RLIMIT_NPROC resource limit mechanism. The RLIMIT_NPROC attack vector specifically targets process creation limits, which when combined with the unchecked setuid call, can enable attackers to circumvent normal privilege boundaries. The ATT&CK framework categorizes this under privilege escalation techniques where adversaries leverage weak access controls and improper error handling to gain elevated system privileges.
The operational impact of CVE-2014-0470 extends beyond simple privilege escalation, as it provides attackers with potential access to sensitive system resources and capabilities. Local users who can execute the super command with the -F flag can exploit this vulnerability to gain root access, effectively compromising the entire system. This type of vulnerability is particularly concerning because it requires minimal privileges to exploit and can be leveraged by attackers who have already gained some level of system access. The vulnerability demonstrates how improper error handling in system utilities can create backdoors for privilege escalation attacks, making it a significant concern for system administrators who must ensure proper access controls and privilege management. The implications are further amplified because such vulnerabilities often remain undetected for extended periods, allowing attackers to maintain persistent access to compromised systems while the underlying flaw continues to exist.
Mitigation strategies for CVE-2014-0470 primarily focus on addressing the root cause through proper code review and implementation practices. System administrators should immediately update to patched versions of the super command utility where the return value of setuid is properly checked and validated. The implementation should include proper error handling that terminates execution or raises appropriate alerts when setuid fails to change privileges successfully. Additionally, organizations should enforce strict access controls and limit the ability of local users to execute the super command with elevated privileges. Security monitoring should include detection of unusual privilege escalation attempts and process execution patterns that might indicate exploitation attempts. The fix should align with security best practices such as those outlined in the Open Web Application Security Project guidelines, specifically addressing error handling and privilege management. Regular code audits should be conducted to identify similar unchecked return value issues in other system utilities and applications, ensuring comprehensive protection against such vulnerabilities. Furthermore, implementing proper input validation and privilege separation mechanisms can help prevent similar issues from occurring in future software implementations.