X11 Server Unauthenticated Access Open Vulnerability CVE-1999-0526

Solution Verified - Updated -

Issue

  • Is my Red Hat Enterprise Linux OS affected with Vulnerability described in CVE-1999-0526?
  • The remote X11 server accepts connection from anywhere.
  • An attacker may connect to it to eavesdrop on the keyboard and mouse events of a user on the remote host.
  • It is even possible for an attacker to grab a screenshot of the remote host or to display arbitrary programs.
  • An attacker may exploit this flaw to obtain the username and password of a user on the remote host.

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 5

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