In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

Affected: Maven: org.eclipse.jetty:jetty-webapp, Maven: org.mortbay.jetty:jetty-webapp

### Impact On Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

Additionally, any user code uses of [WebAppContext::getTempDirectory](https://www.eclipse.org/jetty/javadoc/9.4.31.v20200723/org/eclipse/jetty/webapp/WebAppContext.html#getTempDirectory()) would similarly be vulnerable.

Additionally, any user application code using the `ServletContext` attribute for the tempdir will also be impacted. See: https://javaee.github.io/javaee-spec/javadocs/javax/servlet/ServletContext.html#TEMPDIR

For example: ```java import java.io.File; import java.io.IOException; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;

public class ExampleServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { File…

Affected: openEuler:20.03-LTS-SP1: jetty

Jetty is a 100% Java HTTP Server and Servlet Container. This means that you do not need to configure and run a separate web server (like Apache) in order to use Java, servlets and JSPs to generate dynamic content. Jetty is a fully featured web server for static and dynamic content. Unlike separate server/container solutions, this means that your web server and web application run in the same process, without interconnection overheads and complications. Furthermore, as a pure java component, Jetty can be simply included in your application for demonstration, distribution or deployment. Jetty is available on all Java supported platforms. Security Fix(es): In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.(CVE-2020-27216)

libwebp: heap-based buffer overflow in PutLE16() nss: TLS 1.3 CCS flood remote DoS Attack openldap: NULL pointer dereference for unauthenticated packet in slapd kernel: security bypass in certs/blacklist.c and certs/system_keyring.c jetty: local temporary directory hijacking vulnerability jetty: buffer not correctly recycled in Gzip Request inflation jetty: request containing multiple Accept headers with a large number of "quality" parameters may lead to DoS libwebp: heap-based buffer overflow in WebPDecode*Into functions libwebp: use-after-free in EmitFancyRGB() in dec/io_dec.c libxml2: Use-after-free in xmlEncodeEntitiesInternal() in entities.c libxml2: Heap-based buffer overflow in xmlEncodeEntitiesInternal() in entities.c libxml2: Use-after-free in xmlXIncludeDoProcess() in xinclude.c lz4: memory corruption due to an integer overflow bug caused by memmove argument libxml2: NULL pointer dereference when post-validating mixed content parsed in recovery mode libxml2: Exponential entity expansion attack bypasses all existing protection mechanisms rpm: Signature checks bypass via corrupted rpm package jenkins-2-plugins/config-file-provider: Does not configure its XML parser to prevent XML external entity (XXE) attacks. jenkins-2-plugins/config-file-provider: Does not correctly perform permission checks in several HTTP endpoints. jenkins-2-plugins/config-file-provider: does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnera…

Affected: Ubuntu:14.04:LTS: jetty, Ubuntu:14.04:LTS: jetty8, Ubuntu:16.04:LTS: jetty, Ubuntu:16.04:LTS: jetty8, Ubuntu:16.04:LTS: jetty9, Ubuntu:18.04:LTS: jetty9, Ubuntu:20.04:LTS: jetty9

In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

Ein lokaler Angreifer kann eine Schwachstelle in Eclipse Jetty ausnutzen, um Sicherheitsvorkehrungen zu umgehen.