CVE-2021-30640: Auth weakness in JNDIRealm

Published Jul 12, 2021
·
Updated

A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.

Other sources

Apache Tomcat could allow a remote attacker to bypass security restrictions, caused by improper authentication validation in the JNDI Realm. By sending a specially-crafted request using various user names, an attacker could exploit this vulnerability to bypass some of the protection provided by the LockOut Realm.

— IBM

Affected Software

24 affected componentsFixes available
redhat/jws5-tomcat<0:9.0.50-3.redhat_00004.1.el7
0:9.0.50-3.redhat_00004.1.el7
redhat/jws5-tomcat-native<0:1.2.30-3.redhat_3.el7
0:1.2.30-3.redhat_3.el7
redhat/jws5-tomcat-vault<0:1.1.8-4.Final_redhat_00004.1.el7
0:1.1.8-4.Final_redhat_00004.1.el7
redhat/jws5-tomcat<0:9.0.50-3.redhat_00004.1.el8
0:9.0.50-3.redhat_00004.1.el8
redhat/jws5-tomcat-native<0:1.2.30-3.redhat_3.el8
0:1.2.30-3.redhat_3.el8
redhat/jws5-tomcat-vault<0:1.1.8-4.Final_redhat_00004.1.el8
0:1.1.8-4.Final_redhat_00004.1.el8
redhat/tomcat<10.0.6
10.0.6
redhat/tomcat<9.0.46
9.0.46
redhat/tomcat<8.5.66
8.5.66
redhat/tomcat<7.0.109
7.0.109
IBM DRM<=2.0.6
Apache Tomcat>=7.0.0<7.0.109
Apache Tomcat>=8.5.0<8.5.66
Apache Tomcat>=9.0.0<9.0.46
Apache Tomcat>=10.0.0<10.0.6
Oracle Communications Cloud Native Core Policy=1.14.0
Oracle Communications Diameter Signaling Router>=8.0.0<=8.5.0
Oracle Communications Pricing Design Center=12.0.0.3.0
Oracle Hospitality Cruise Shipboard Property Management System=20.1.0
Oracle Tekelec Platform Distribution>=7.4.0<=7.7.1
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Debian Debian Linux=11.0
debian/tomcat9
9.0.43-2~deb11u109.0.43-2~deb11u129.0.70-29.0.95-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/jws5-tomcat to a version that resolves this vulnerability.

    Fixed in 0:9.0.50-3.redhat_00004.1.el7
  2. Upgrade

    Upgrade redhat/jws5-tomcat-native to a version that resolves this vulnerability.

    Fixed in 0:1.2.30-3.redhat_3.el7
  3. Upgrade

    Upgrade redhat/jws5-tomcat-vault to a version that resolves this vulnerability.

    Fixed in 0:1.1.8-4.Final_redhat_00004.1.el7
  4. Upgrade

    Upgrade redhat/jws5-tomcat to a version that resolves this vulnerability.

    Fixed in 0:9.0.50-3.redhat_00004.1.el8
  5. Upgrade

    Upgrade redhat/jws5-tomcat-native to a version that resolves this vulnerability.

    Fixed in 0:1.2.30-3.redhat_3.el8
  6. Upgrade

    Upgrade redhat/jws5-tomcat-vault to a version that resolves this vulnerability.

    Fixed in 0:1.1.8-4.Final_redhat_00004.1.el8
  7. Upgrade

    Upgrade debian/tomcat9 to a version that resolves this vulnerability.

    Fixed in 9.0.43-2~deb11u10Fixed in 9.0.43-2~deb11u12Fixed in 9.0.70-2Fixed in 9.0.95-1
  8. Upgrade

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

    Fixed in 10.0.6
  9. Upgrade

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

    Fixed in 9.0.46
  10. Upgrade

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

    Fixed in 8.5.66
  11. Upgrade

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

    Fixed in 7.0.109

Event History

Jul 12, 2021
CVE Published
12:00 AM
CVE Published
via MITRE·02:55 PM
Data Sourced
via MITRE·02:55 PM
DescriptionWeakness
Data Sourced
via NVD·03:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·07:04 PM
DescriptionSeverityAffected Software
Jan 11, 2024
Data Sourced
via Launchpad·11:56 PM
Description
Sep 16, 2024
Data Sourced
via Ubuntu·02:31 AM
RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is CVE-2021-30640?

CVE-2021-30640 is a vulnerability in the JNDI Realm of Apache Tomcat that allows an attacker to bypass security restrictions.

2

How does CVE-2021-30640 impact Apache Tomcat?

CVE-2021-30640 allows a remote attacker to bypass security restrictions in Apache Tomcat.

3

What is the severity of CVE-2021-30640?

CVE-2021-30640 has a severity rating of 7.5 (high).

4

Which versions of Apache Tomcat are affected by CVE-2021-30640?

Affected versions include Apache Tomcat 7.0.0 to 7.0.109, 8.5.0 to 8.5.66, 9.0.0 to 9.0.46, and 10.0.0 to 10.0.6.

5

How can I fix CVE-2021-30640 in Apache Tomcat?

To fix CVE-2021-30640, upgrade to Apache Tomcat versions 7.0.110, 8.5.67, 9.0.47, or 10.0.7.

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