Denial of Service (DoS) Affecting org.eclipse.jetty:jetty-server package, versions [,9.4.51)[10.0.0,10.0.14)[11.0.0,11.0.14)[12.0.0.alpha0,12.0.0.beta0)
Threat Intelligence
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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- published19 Apr 2023
- disclosed19 Apr 2023
- creditlachlan-roberts
Introduced: 19 Apr 2023
CVE-2023-26048 (opens in a new tab)How to fix?
Upgrade org.eclipse.jetty:jetty-server to version 9.4.51, 10.0.14, 11.0.14, 12.0.0.beta0 or higher.
Overview
org.eclipse.jetty:jetty-server is a lightweight highly scalable java based web server and servlet engine.
Affected versions of this package are vulnerable to Denial of Service (DoS) such that servlets with multipart support (e.g. annotated with @MultipartConfig) that call HttpServletRequest.getParameter() or HttpServletRequest.getParts() may cause OutOfMemoryError when the client sends a multipart request with a part that has a name but no filename and very large content.
Note: This happens even with the default settings of fileSizeThreshold=0, which should stream the whole part content to disk. An attacker client may send a large multipart request and cause the server to throw OutOfMemoryError. However, the server may be able to recover after the OutOfMemoryError and continue its service -- although it may take some time.
Workaround
Users unable to upgrade can set the multipart parameter maxRequestSize, which must be set to a non-negative value.
Details
Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.
Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.
One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.
When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.
Two common types of DoS vulnerabilities:
High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.
Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm
wspackage