Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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nodebb is a package that utilizes web sockets for instant interactions and real-time notifications.
Affected versions of this package are vulnerable to Improper Handling of Unexpected Data Type. An unauthenticated attacker is able to send a malicious Socket.IO message to cause a NodeBB worker instance to crash. Although NodeBB’s cluster manager attempts to spawn a new replacement worker, it is possible to cause the NodeBB cluster manager to terminate after crashing NodeBB workers multiple times within a short span of time.
Note:
The vulnerability can be exploited by using an array as the Socket.IO event name to trigger a crash when invoking eventName.startsWith()
, or by using an object as the Socket.IO event name, and setting the toString
property, to trigger a crash when invoking eventName.toString()
.