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Log Correlation Engine 4.8.1 Release Notes - 9/7/2016

The following notes describe the changes that are included in Log Correlation Engine (LCE) version 4.8.1, significant enhancements to LCE, and information about upgrading. A PDF file of these release notes is also available here.

General Upgrade Notes

  • As with any application, it is always advisable to perform a backup of your LCE installation and archived logs before upgrading.
  • Detailed instructions and notes on upgrading are located in the Log Correlation Engine 4.8 User Guide.
  • Supported upgrade paths:
    • 4.6.0 > 4.8.1
    • 4.8.0 > 4.8.1

Compatibility Notes

  • LCE version 4.8.1 is compatible with SecurityCenter version or later. Older versions of SecurityCenter will work with LCE 4.8 without issues, but will not support some new features.
  • LCE version 4.8.1 is compatible with LCE Clients version 4.0.0 or later. Older LCE Clients will not be able to log in and send event data to LCE 4.8.1.
  • Please contact Tenable Support at if you have any questions about compatibility issues.

File Names & MD5 Checksums

File MD5
lce-4.8.1-el5.x86_64.rpm 51b91a3cdeadf800f899729a9b6b29ff
lce-4.8.1-el6.x86_64.rpm e37efe41df0d7172e34c514f87dcec78
lce-4.8.1-el7.x86_64.rpm 081e931cafc3f8598cca4cd9e33fbc52

New Features and Improvements:

  • Added support for Google Pub-Sub endpoints in the LCE Web Query 4.8.0 agent
  • Speed up upgrades by distinctly correcting only database files and folders not already owned by LCE
  • Enable extraction of usernames from plugins normalizing logs of type "login-failure"
  • Reduce TASL script log file size by de-duplicating similar and adjacent admin log messages
  • Log license updates in the web server log file whenever plugins are updated

Security Enhancements:

  • Upgrade OpenSSL to 1.0.2h
  • Upgrade libpcre to 8.39
  • Upgrade libxml2 to 2.9.4
  • Upgrade libcURL to 7.50.1
  • Upgrade jQuery Core to 2.2.4

Resolved Items:

  • Fixed a performance issue related to connecting thousands of agents to a single LCE server
  • Fixed an issue rebuilding raw logs within the TASL engine which could result in incorrect tokens in rebuilt logs being passed to TASL scripts
  • Fixed an issue with blank lines being sent between logs to the 2nd-to-Nth TCP syslog forward targets
  • Fixed an issue where a large user database could result in a server reboot at startup
  • Fixed an issue displaying IP addresses in little-endian byte order in the Connection Summary in SecurityCenter
  • Fixed an issue that resulted in incorrectly interpreted included networks for some TASLs resulting in incorrect directionality calculations
  • Fixed an issue where the text indexer would re-index from the first silo rather than the state persisted to disk on shutdown
  • Fixed an issue where a PRM plugin with a dynamically determined event field could restart the engine
  • Fixed resources leaks in the TASL engine when reloading plugins

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