Package Instance

Eclipse Jetty's PushSessionCacheFilter can cause remote DoS attacks
### Impact
 Jetty PushSessionCacheFilter can be exploited by unauthenticated users to launch remote DoS attacks by exhausting the server’s memory.

### Patches
* https://github.com/jetty/jetty.project/pull/9715
* https://github.com/jetty/jetty.project/pull/9716

### Workarounds
The session usage is intrinsic to the design of the PushCacheFilter.  The issue can be avoided by:
 + not using the PushCacheFilter.  Push has been deprecated by the various IETF specs and early hints responses should be used instead.
 + reducing the reducing the idle timeout on unauthenticated sessions will reduce the time such session stay in memory.
 + configuring a session cache to use [session passivation](https://jetty.org/docs/jetty/12/programming-guide/server/session.html), so that sessions are not stored in memory, but rather in a database or file system that may have significantly more capacity than memory.

### References
* https://github.com/jetty/jetty.project/pull/10756
* https://github.com/jetty/jetty.project/pull/10755

Eclipse Jetty has a denial of service vulnerability on DosFilter
Description
There exists a security vulnerability in Jetty's DosFilter which can be exploited by unauthorized users to cause remote denial-of-service (DoS) attack on the server using DosFilter. By repeatedly sending crafted requests, attackers can trigger OutofMemory errors and exhaust the server's memory finally.


Vulnerability details
The Jetty DoSFilter (Denial of Service Filter) is a security filter designed to protect web applications against certain types of Denial of Service (DoS) attacks and other abusive behavior. It helps to mitigate excessive resource consumption by limiting the rate at which clients can make requests to the server.  The DoSFilter monitors and tracks client request patterns, including request rates, and can take actions such as blocking or delaying requests from clients that exceed predefined thresholds.  The internal tracking of requests in DoSFilter is the source of this OutOfMemory condition.


Impact
Users of the DoSFilter may be subject to DoS attacks that will ultimately exhaust the memory of the server if they have not configured session passivation or an aggressive session inactivation timeout.


Patches
The DoSFilter has been patched in all active releases to no longer support the session tracking mode, even if configured.


Patched releases:

  *  9.4.54
  *  10.0.18
  *  11.0.18
  *  12.0.3