abhishekheaven7 opened a new issue #8203:
URL: https://github.com/apache/pulsar/issues/8203


   Pulsar client has jetty dependency [pulsar-client-2.6.1.jar (shaded: 
org.eclipse.jetty:jetty-util:9.4.29.v20200521) ] which has critical security 
vulnerability.
   CWE-672 CWE-672 Operation on a Resource after Expiration or Release: 
CVE-2019-17638
   
   In Eclipse Jetty, versions 9.4.27.v20200227 to 9.4.29.v20200521, in case of 
too large response headers, Jetty throws an exception to produce an HTTP 431 
error. When this happens, the ByteBuffer containing the HTTP response headers 
is released back to the ByteBufferPool twice. Because of this double release, 
two threads can acquire the same ByteBuffer from the pool and while thread1 is 
about to use the ByteBuffer to write response1 data, thread2 fills the 
ByteBuffer with other data. Thread1 then proceeds to write the buffer that now 
contains different data. This results in client1, which issued request1 seeing 
data from another request or response which could contain sensitive data 
belonging to client2 (HTTP session ids, authentication credentials, etc.). If 
the Jetty version cannot be upgraded, the vulnerability can be significantly 
reduced by configuring a responseHeaderSize significantly larger than the 
requestHeaderSize (12KB responseHeaderSize and 8KB requestHeaderSize).
   
   Reference Info:
   
   http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-17638 
   


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