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AUSCERT External Security Bulletin Redistribution
ESB-2019.4714
Apache Tomcat gets security fixes
19 December 2019
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AusCERT Security Bulletin Summary
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Product: Tomcat
Publisher: Apache
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Existing Account
Unauthorised Access -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-17563 CVE-2019-12418
Reference: ESB-2019.2254
ESB-2019.1683
ESB-2019.1344
Original Bulletin:
http://tomcat.apache.org/security-9.html
http://tomcat.apache.org/security-8.html
http://tomcat.apache.org/security-7.html
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CVE-2019-12418 Local Privilege Escalation
Severity: Moderate
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 9.0.0.M1 to 9.0.28
Apache Tomcat 8.5.0 to 8.5.47
Apache Tomcat 7.0.0 to 7.0.97
Description:
When Tomcat is configured with the JMX Remote Lifecycle Listener, a
local attacker without access to the Tomcat process or configuration
files is able to manipulate the RMI registry to perform a
man-in-the-middle attack to capture user names and passwords used to
access the JMX interface. The attacker can then use these credentials to
access the JMX interface and gain complete control over the Tomcat instance.
The JMX Remote Lifecycle Listener will be deprecated in future Tomcat
releases, will be removed for Tomcat 10 and may be removed from all
Tomcat releases some time after 2020-12-31.
Users should also be aware of CVE-2019-2684, a JRE vulnerability that
enables this issue to be exploited remotely.
Mitigation:
Users of affected versions should apply one of the following mitigations:
- - Disable Tomcat's JmxRemoteLifecycleListener and use the built-in
remote JMX facilities provided by the JVM
- - Upgrade to Apache Tomcat 9.0.29 or later
- - Upgrade to Apache Tomcat 8.5.49 or later
- - Upgrade to Apache Tomcat 7.0.99 or later
Note: The fix was included in versions 7.0.98 and 8.5.48 but those
versions were not released.
Credit:
An Trinh of Viettel Cyber Security
References:
[1] http://tomcat.apache.org/security-9.html
[2] http://tomcat.apache.org/security-8.html
[3] http://tomcat.apache.org/security-7.html
[4]
https://i.blackhat.com/eu-19/Wednesday/eu-19-An-Far-Sides-Of-Java-Remote-Protocols.pdf
[5] https://nvd.nist.gov/vuln/detail/CVE-2019-2684
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CVE-2019-17563 Session fixation
Severity: Low
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 9.0.0.M1 to 9.0.29
Apache Tomcat 8.5.0 to 8.5.49
Apache Tomcat 7.0.0 to 7.0.98
Description:
When using FORM authentication there was a narrow window where an
attacker could perform a session fixation attack. The window was
considered too narrow for an exploit to be practical but, erring on the
side of caution, this issue has been treated as a security vulnerability.
Mitigation:
- - Upgrade to Apache Tomcat 9.0.30 or later
- - Upgrade to Apache Tomcat 8.5.50 or later
- - Upgrade to Apache Tomcat 7.0.99 or later
Credit:
William Marlow (IBM).
References:
[1] http://tomcat.apache.org/security-9.html
[2] http://tomcat.apache.org/security-8.html
[3] http://tomcat.apache.org/security-7.html
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