CVE-2016-10703: Denial of Service in ecstatic
Summary
CVE-2016-10703: Denial of Service in ecstatic. Affects ecstatic versions < 2.0.0. Fixed in 2.0.0. How to fix ↓
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Background
The ecstatic package is a simple static file server middleware used in web applications. It provides a convenient way to serve static files such as HTML, CSS, and JavaScript. However, this package is vulnerable to a denial of service attack. An attacker can exploit this vulnerability by sending a payload containing a large number of null bytes (%00). This payload can cause the ecstatic server to crash due to running out of memory. The severity of the attack increases with the payload size.
Vulnerability Detail
The vulnerability in ecstatic allows an attacker to crash the server by overwhelming it with a payload containing null bytes. The impact of this attack can range from a noticeable lag in server response time to a complete server crash. The vulnerability arises from a lack of input validation and handling of null bytes in the package's code. By sending a payload with a large number of null bytes, an attacker can exploit this weakness and disrupt the normal functioning of the server.
How To Fix
Minimum fixed version
2.0.0
This is the first release that contains the fix.
npm install ecstatic@2.0.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If updating to the latest version is not feasible, a temporary workaround can be implemented by implementing input validation and filtering on the server side. This can involve rejecting or sanitizing requests that contain a large number of null bytes. However, it is strongly advised to update to the latest version as soon as possible to ensure comprehensive security.
Conclusion
The ecstatic package is vulnerable to a denial of service attack that can be triggered by sending a payload with a large number of null bytes. This vulnerability can lead to server crashes and performance degradation. To mitigate this vulnerability, it is crucial to update to version 2.0.0 or later of the package. Implementing input validation and filtering on the server side can provide a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for ecstatic →
FAQ
The impact can range from server performance degradation to a complete server crash, depending on the payload size.
Updating to version 2.0.0 or later of the ecstatic package is the recommended mitigation. Implementing input validation and filtering on the server side can also provide a temporary workaround.
Yes, the CVSS score for this vulnerability is 7.5, indicating a high severity.
While specific exploits may not be publicly available, the vulnerability has the potential to be exploited by sending payloads with a large number of null bytes.
There have been reported instances of the ecstatic server crashing when subjected to payloads with a large number of null bytes. These instances serve as evidence of the vulnerability's real-world impact.
References
Related vulnerabilities
Recent vulnerabilities recorded for ecstatic.
