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OpenAdvisories
High DSA-4949-1 7 CVEs

jetty9 - security update

Published Aug 5, 2021 · Updated Mar 9, 2026

Fixed packages 1

ReleasePackageFixed in
Debian · 10 jetty9 9.4.16-0+deb10u1

Vulnerabilities 7

  • High 7.5
    CVE-2021-28165 Public exploit EPSS 54%

    Jetty vulnerable to incorrect handling of invalid large TLS frame, exhausting CPU resources

    In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame.

  • High 7.0

    Local Temp Directory Hijacking Vulnerability

    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 pr…

  • Medium 6.1

    Cross-site Scripting in Eclipse Jetty

    In Eclipse Jetty version 9.2.26 and older, 9.3.25 and older, and 9.4.15 and older, the server is vulnerable to XSS conditions if a remote client USES a specially formatted URL against the DefaultServlet or ResourceHandler that is configured for showing a List…

  • Medium 5.3

    Installation information leak in Eclipse Jetty

    In Eclipse Jetty version 7.x, 8.x, 9.2.27 and older, 9.3.26 and older, and 9.4.16 and older, the server running on any OS and Jetty version combination will reveal the configured fully qualified directory base resource location on the output of the 404 error …

  • Medium 5.3
    CVE-2021-28169 Scanner template EPSS 78%

    Jetty Utility Servlets ConcatServlet Double Decoding Information Disclosure Vulnerability

    For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory. For example a request to `/concat?/%2557EB-INF/web.xml` can ret…

  • Medium 5.2
    CVE-2020-27223 Public exploit EPSS 78%

    DOS vulnerability for Quoted Quality CSV headers

    In Eclipse Jetty 9.4.6.v20170531 to 9.4.36.v20210114 (inclusive), 10.0.0, and 11.0.0 when Jetty handles a request containing multiple Accept headers with a large number of “quality” (i.e. q) parameters, the server may enter a denial of service (DoS) state due…

  • Low 2.9
    CVE-2021-34428 Public exploit

    SessionListener can prevent a session from being invalidated breaking logout

    For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, if an exception is thrown from the SessionListener#sessionDestroyed() method, then the session ID is not invalidated in the session ID manager. On deployments with clustered sessions and multiple con…