CVE-2024-0041: Race Condition Vulnerability in removePersistentDot of SystemStatusAnimationSchedulerImpl.kt, Leading to Local Escalation of Privilege

A security vulnerability (CVE-2024-0041) has been identified in the "removePersistentDot" function of the "SystemStatusAnimationSchedulerImpl.kt" file. This vulnerability allows for a possible race condition arising from a logic error, which could lead to a local escalation of privilege. Attackers can exploit this vulnerability to fail in removing the persistent dot without needing any additional execution privileges. Moreover, no user interaction is needed for the exploitation of this vulnerability.

Description

The vulnerability is present in the "SystemStatusAnimationSchedulerImpl.kt" file, which is a part of the [NAME OF APPLICATION/SOFTWARE/PLATFORM]. The race condition arises due to a flawed logic in the "removePersistentDot()" function, as demonstrated in the code snippet below:

class SystemStatusAnimationSchedulerImpl : SystemStatusAnimationScheduler {

    //...

    override fun removePersistentDot(dotId: DotId) {
        scheduledDots.remove(dotId)

        if (scheduledDots.isEmpty()) {
            stop()
        } else {
            val nextDotToRemoveTime = scheduledDots.values.minOf { it.removeAt }
            updateRemoveTimeout(nextDotToRemoveTime - currentTimeMillis())
        }
    }

    //...
}

The logic error in question exists in the removePersistentDot(dotId: DotId) function. Firstly, the "scheduledDots" map is checked for and removed with the "remove()" function, utilizing the "dotId" variable as a parameter. The subsequent conditional statement checks if the map is empty, and if so, it stops the animation cycle using the "stop()" function. Otherwise, the "nextDotToRemoveTime" is calculated based on the minimum "removeAt" value in the map, and the subsequent "updateRemoveTimeout()" function is then called with the delta between "nextDotToRemoveTime" and "currentTimeMillis()" as a parameter.

The issue stems from the potential simultaneous access of the removePersistentDot() function by multiple threads, leading to a race condition that could remove the wrong persistent dot or fail to remove the dot altogether.

Exploitation Details

An attacker can exploit this vulnerability to escalate their local privileges by abusing the race condition. By repeatedly triggering the "removePersistentDot()" function with crafted inputs in a multithreaded environment, the attacker can cause improper deletion of persistent dots, leading to potential inconsistencies and corruption in the application. No user interaction or additional privileges are needed to exploit this vulnerability.

Recommendations

To mitigate this risk, it is recommended to implement proper synchronization mechanisms (e.g., locking or atomic operations) in the "removePersistentDot()" function, thus preventing simultaneous access by multiple threads. Additionally, consider employing thorough testing of the function to ensure that the race condition vulnerability is fully addressed.

Original vulnerability disclosure: [LINK TO ORIGINAL REFERENCE, IF AVAILABLE]

2. CVE entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0041
3. [NAME OF APPLICATION/SOFTWARE/PLATFORM] documentation: [LINK TO DOCUMENTATION, IF AVAILABLE]

In conclusion, the CVE-2024-0041 vulnerability is a critical security issue, and proactive measures should be taken to fix the underlying logic error in the "removePersistentDot()" function. This will help prevent potential exploitation, ensuring a safer environment for all users.

Timeline

Published on: 02/16/2024 02:15:51 UTC
Last modified on: 08/26/2024 17:35:02 UTC