This document provides installation instructions for Unified CCE 11.6(2) ES54. It also contains a list of Unified CCE issues resolved by this engineering special. Review all installation information before installing the product. Failure to install this engineering special as described can result in inconsistent Unified CCE behavior.
This document contains these sections:
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Ghostcat vulnerability (CVE-2020-1938) which
allows remote code execution in certain condition where tomcat listens on port
8009 for all external IP addresses. ICM applications are not found to be
vulnerable since it uses reverse proxy where IIS intercepts all external
requests and redirects to tomcat which listens only on local IP address for
port 8009. However, for those who are impacted with this vulnerability where
Tomcat listens on port 8009 for all external addresses, Apache has made changes
to default behavior by updating Server.xml to include a new field called 'secretRequired' with default value as
"true". This breaks even the web-applications that are not
impacted by Ghostcat since they don't provision
option to provide secret in external requests. Apache Tomcat updates are
cumulative in nature and any future minor update for Tomcat is not possible
without change to Server.xml file of Tomcat. This proactive ES will facilitate
future updates to Tomcat by Customers using Cisco provided Tomcat Upgrade Utility
by delivering the Cisco customizer server.xml along with options to support ES
rollback if required so that web-apps continue to work even after any ES
uninstallation.
Background:
·
11.6(2) Shipped with Tomcat 7.0.90.
·
Tomcat 7.0.90 is vulnerable to Ghostcat (CVE-2020-1938) and is fixed with Tomcat 7.0.99
onwards.
·
Customers were recommended to use Cisco provided
'Tomcat Upgrade Utility' for minor version upgrade.
For customers in older release where
defect CSCvt31436 fix is not available, A field notice is
provided with problem description and work-around: https://www.cisco.com/c/en/us/support/docs/field-notices/705/fn70542.html.
After using utility to upgrade Tomcat, manual steps were provided to
update required Server.xml and get things working. However still an issue
remained opened CSCvt60447(websetup
throwing error after patch uninstall). Customer would potentially hit this when
they uninstall a ES on older release where manual work-around is applied post
tomcat upgrade.
THIS ES WILL DELIVER CUSTOM SERVER.XML SO THAT CUSTOMERS
DON’T NEED TO MANUALLY MODIFY THEM AS SPECIFIED IN FIELD NOTICE. ALSO IT
WILL FIX ANY ES UNINSTALATION ISSUES RELATED TO SERVER.XML FILE.
TOMCAT UPGRADE UTILITY POSTED AT CCO
FOR 11.6(2) CAN BE USED FOR MINOR VERSION UPGRADE.
IF A CUSTOMER HAS APPLIED MANUL WORKAROUND AS INDICATED IN FIELD NOTICE,
CUSTOMER SHOULD STILL APPLY THIS ES. IT WILL RESOLVE THE UNINSTALL ISSUE
11.6(2)
This section lists the Unified CCE components on which you can and cannot
install this engineering special.
You can install Unified CCE 11.6(2) ES54
on these Unified CCE components:
· AW,
Router, Logger, PG – all CCE machines which has tomcat installed.
Do not install this engineering special on the following components:
Installation
of this patch requires the all CCE services to be shut down during the entire
period of installation. It is always recommended to install this ES during a
scheduled downtime.
Note: Remove patches in the reverse order of their installation. For example, if you installed patches 3, then 5, then 10 for a product, you must uninstall patches 10, 5, and 3, in that order, to remove the patches from that product.
This section provides a list of significant Unified CCE defects resolved by this engineering special. It contains these subsections:
Note: You can view more information on and track individual Unified CCE defects using the Cisco Bug Search tool, located at: https://bst.cloudapps.cisco.com/bugsearch/search?null.
This section lists caveats specifically resolved by Unified CCE 11.6(2) ES54.
Caveats in this section are ordered by UNIFIED CCE component, severity, and then identifier.
Identifier |
Severity |
Component |
Headline |
CSCvv50855 |
3 |
web.setup |
Webapp failed to launch due to isapi
error: |
Caveats are ordered by severity then defect number.
Defect Number: CSCvv50855
Component: web.setup
Severity: 3
Headline: Webapp failed to launch due to isapi error:
Symptom:
Conditions:
Workaround: 1.Launch IIS manager 2.Select Default Web site 3.Select isapi Filters 4. Remove jakarta
filter
Further Problem Description:
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If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to https://www.cisco.com/c/en/us/support/index.html.
P3 and P4 level problems are defined as follows:
In each of the above cases, use the Cisco TAC site to quickly find answers to your questions.
If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following site: https://mycase.cloudapps.cisco.com/create/start/
If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following sites:
P1 and P2 level problems are defined as follows: