CVE-2016-0762: Medium severity Apache Tomcat vulnerability

Published Nov 1, 2016
·
Updated

The following flaw was found in Tomcat:

The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.

Upstream patches:

6.0.47: https://svn.apache.org/viewvc?view=revision&revision=1758506 7.0.72: https://svn.apache.org/viewvc?view=revision&revision=1758502 8.5.5: https://svn.apache.org/viewvc?view=revision&revision=1758500 8.0.37: https://svn.apache.org/viewvc?view=revision&revision=1758501

External References:

https://tomcat.apache.org/security-6.html#FixedinApacheTomcat6.0.47 https://tomcat.apache.org/security-7.html#FixedinApacheTomcat7.0.72 https://tomcat.apache.org/security-8.html#FixedinApacheTomcat8.5.5and8.0.37

Other sources

The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.

— Ubuntu

Affected Software

52 affected componentsFixes available
redhat/tomcat<6.0.47
6.0.47
redhat/tomcat<7.0.72
7.0.72
redhat/tomcat<8.5.5
8.5.5
redhat/tomcat<8.0.37
8.0.37
maven/org.apache.tomcat:tomcat>=6.0.0<=6.0.45
6.0.46
maven/org.apache.tomcat:tomcat>=7.0.0<7.0.72
7.0.72
maven/org.apache.tomcat:tomcat>=8.0.0.RC1<=8.0.36
8.0.37
maven/org.apache.tomcat:tomcat>=8.5.0<=8.5.4
8.5.5
maven/org.apache.tomcat:tomcat>=9.0.0M1<=9.0.0.M9
9.0.0.M10
debian/tomcat6
Apache Tomcat>=6.0.0<=6.0.45
Apache Tomcat>=7.0.0<=7.0.70
Apache Tomcat>=8.0<=8.0.36
Apache Tomcat>=8.5.0<=8.5.4
Apache Tomcat=9.0.0-milestone1
Apache Tomcat=9.0.0-milestone2
Apache Tomcat=9.0.0-milestone3
Apache Tomcat=9.0.0-milestone4
Apache Tomcat=9.0.0-milestone5
Apache Tomcat=9.0.0-milestone6
Apache Tomcat=9.0.0-milestone7
Apache Tomcat=9.0.0-milestone8
Apache Tomcat=9.0.0-milestone9
Canonical Ubuntu Linux=16.04
Debian Debian Linux=8.0
redhat Jboss Enterprise Web Server=3.0.0
redhat Enterprise Linux Desktop=7.0
redhat Enterprise Linux Eus=7.4
redhat Enterprise Linux Eus=7.5
redhat Enterprise Linux Eus=7.6
redhat Enterprise Linux Eus=7.7
redhat Enterprise Linux Server=7.0
redhat Enterprise Linux Server Aus=7.4
redhat Enterprise Linux Server Aus=7.6
redhat Enterprise Linux Server Aus=7.7
redhat Enterprise Linux Server Tus=7.6
redhat Enterprise Linux Server Tus=7.7
redhat Enterprise Linux Workstation=7.0
NetApp OnCommand Insight
NetApp Oncommand Shift
NetApp Snap Creator Framework
Oracle Communications Diameter Signaling Router>=8.0.0<=8.5.0
Oracle Tekelec Platform Distribution>=7.4.0<=7.7.1
Apache Tomcat=9.0.0-m1
Apache Tomcat=9.0.0-m2
Apache Tomcat=9.0.0-m3
Apache Tomcat=9.0.0-m4
Apache Tomcat=9.0.0-m5
Apache Tomcat=9.0.0-m6
Apache Tomcat=9.0.0-m7
Apache Tomcat=9.0.0-m8
Apache Tomcat=9.0.0-m9

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat to a version that resolves this vulnerability.

    Fixed in 6.0.46
  2. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat to a version that resolves this vulnerability.

    Fixed in 7.0.72
  3. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat to a version that resolves this vulnerability.

    Fixed in 8.0.37
  4. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat to a version that resolves this vulnerability.

    Fixed in 8.5.5
  5. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.0.M10
  6. Upgrade

    Upgrade redhat/tomcat to a version that resolves this vulnerability.

    Fixed in 6.0.47
  7. Upgrade

    Upgrade redhat/tomcat to a version that resolves this vulnerability.

    Fixed in 7.0.72
  8. Upgrade

    Upgrade redhat/tomcat to a version that resolves this vulnerability.

    Fixed in 8.5.5
  9. Upgrade

    Upgrade redhat/tomcat to a version that resolves this vulnerability.

    Fixed in 8.0.37
  10. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 6.0.47
  11. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 7.0.72
  12. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 8.0.37
  13. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 8.5.5

Event History

Oct 28, 2016
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
Nov 1, 2016
Data Sourced
via Red Hat·10:05 AM
DescriptionSeverityAffected Software
Aug 10, 2017
CVE Published
via MITRE·04:00 PM
Data Sourced
via MITRE·04:00 PM
DescriptionWeakness
Data Sourced
via NVD·04:29 PM
RemedyDescriptionSeverityWeaknessAffected Software
May 13, 2022
Advisory Published
via GitHub·01:02 AM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2016-0762?

CVE-2016-0762 is classified as a medium severity vulnerability due to its potential for timing attacks to disclose valid usernames.

2

How do I fix CVE-2016-0762?

To fix CVE-2016-0762, upgrade to Apache Tomcat versions 6.0.47, 7.0.72, 8.0.37, 8.5.5, or later.

3

What software is affected by CVE-2016-0762?

CVE-2016-0762 affects multiple versions of Apache Tomcat, including versions 6.x, 7.x, 8.x, and 9.0.0-milestone releases.

4

What type of vulnerability is CVE-2016-0762?

CVE-2016-0762 is a timing attack vulnerability affecting the authentication process in Apache Tomcat's Realm implementations.

5

Is there a workaround for CVE-2016-0762?

There are no specific workarounds for CVE-2016-0762, but upgrading to a patched version is the recommended mitigation.

Company

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