OpenSSH 7.7 through 7.9 Integer Overflow or Wraparound Vulnerability

Summary

OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key.

Credit:

The information has been provided by Vendor

The original article can be found at:https://0day.life/exploits/0day-1009.html

 


Details

This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.

Vulnerable Systems:

OpenSSH 7.7 through 7.9 

CVE Information:

CVE-2019-16905

Disclosure Timeline:
Published Date:10/09/2019