Debian 10 LTS DLA-3641-1 Critical: Jetty9 Remote Exploits

The HTTP/2 protocol implementation did not sufficiently verify if HPACK header
values exceed their size limit. Furthermore the HTTP/2 protocol allowed a
denial of service (server resource consumption) because request cancellation
can reset many streams quickly. This problem is also known as Rapid Reset
Attack.

In addition this version also addresses CVE-2020-27218.

If GZIP request body inflation is enabled and requests from different clients
are multiplexed onto a single connection, and if an attacker can send a request
with a body that is received entirely but not consumed by the application, then
a subsequent request on the same connection will see that body prepended to its
body. The attacker will not see any data but may inject data into the body of
the subsequent request.

For Debian 10 buster, these problems have been fixed in version
9.4.50-4+deb10u1.

We recommend that you upgrade your jetty9 packages.

For the detailed security status of jetty9 please refer to
its security tracker page at: