CVE-2021-25329: Incomplete fix for CVE-2020-9484

Published Mar 1, 2021
·
Updated

Last updated 2 August 2024

Other sources

The fix for CVE-2020-9484 was incomplete. When using a highly unlikely configuration edge case, the Tomcat instance was still vulnerable to CVE-2020-9484. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published non-upgrade mitigations for CVE-2020-9484 also apply to this issue.

Upstream commits: Tomcat 10.0: https://github.com/apache/tomcat/commit/6d66e99ef85da93e4d2c2a536ca51aa3418bfaf4 Tomcat 9.0: https://github.com/apache/tomcat/commit/4785433a226a20df6acbea49296e1ce7e23de453 Tomcat 8.5: https://github.com/apache/tomcat/commit/93f0cc403a9210d469afc2bd9cf03ab3251c6f35 Tomcat 7.0: https://github.com/apache/tomcat/commit/74b105657ffbd1d1de80455f03446c3bbf30d1f5

Reference: http://mail-archives.apache.org/modmbox/tomcat-announce/202103.mbox/%3C811bba77-e74e-9f9b-62ca-5253a09ba84f%40apache.org%3E

— Red Hat

The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41, 8.5.0 to 8.5.61 or 7.0.0. to 7.0.107 with a configuration edge case that was highly unlikely to be used, the Tomcat instance was still vulnerable to CVE-2020-9494. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue.

Affected Software

75 affected componentsFixes available
redhat/jws5-ecj<0:4.12.0-3.redhat_2.2.el7
0:4.12.0-3.redhat_2.2.el7
redhat/jws5-tomcat<0:9.0.43-11.redhat_00011.1.el7
0:9.0.43-11.redhat_00011.1.el7
redhat/jws5-tomcat-native<0:1.2.26-3.redhat_3.el7
0:1.2.26-3.redhat_3.el7
redhat/jws5-tomcat-vault<0:1.1.8-2.Final_redhat_00003.1.el7
0:1.1.8-2.Final_redhat_00003.1.el7
redhat/jws5-ecj<0:4.12.0-3.redhat_2.2.el8
0:4.12.0-3.redhat_2.2.el8
redhat/jws5-tomcat<0:9.0.43-11.redhat_00011.1.el8
0:9.0.43-11.redhat_00011.1.el8
redhat/jws5-tomcat-native<0:1.2.26-3.redhat_3.el8
0:1.2.26-3.redhat_3.el8
redhat/jws5-tomcat-vault<0:1.1.8-2.Final_redhat_00003.1.el8
0:1.1.8-2.Final_redhat_00003.1.el8
Apache Tomcat>=7.0.0<=7.0.107
Apache Tomcat>=8.5.0<=8.5.61
Apache Tomcat>=9.0.0<=9.0.41
Apache Tomcat=9.0.0-milestone1
Apache Tomcat=9.0.0-milestone10
Apache Tomcat=9.0.0-milestone11
Apache Tomcat=9.0.0-milestone12
Apache Tomcat=9.0.0-milestone13
Apache Tomcat=9.0.0-milestone14
Apache Tomcat=9.0.0-milestone15
Apache Tomcat=9.0.0-milestone16
Apache Tomcat=9.0.0-milestone17
Apache Tomcat=9.0.0-milestone18
Apache Tomcat=9.0.0-milestone19
Apache Tomcat=9.0.0-milestone2
Apache Tomcat=9.0.0-milestone20
Apache Tomcat=9.0.0-milestone21
Apache Tomcat=9.0.0-milestone22
Apache Tomcat=9.0.0-milestone23
Apache Tomcat=9.0.0-milestone24
Apache Tomcat=9.0.0-milestone25
Apache Tomcat=9.0.0-milestone26
Apache Tomcat=9.0.0-milestone27
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
Apache Tomcat=10.0.0
Apache Tomcat=10.0.0-milestone1
Apache Tomcat=10.0.0-milestone10
Apache Tomcat=10.0.0-milestone2
Apache Tomcat=10.0.0-milestone3
Apache Tomcat=10.0.0-milestone4
Apache Tomcat=10.0.0-milestone5
Apache Tomcat=10.0.0-milestone6
Apache Tomcat=10.0.0-milestone7
Apache Tomcat=10.0.0-milestone8
Apache Tomcat=10.0.0-milestone9
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Oracle Agile PLM=9.3.3
Oracle Agile PLM=9.3.6
Oracle Communications Cloud Native Core Policy=1.14.0
Oracle Communications Cloud Native Core Security Edge Protection Proxy=1.6.0
Oracle Communications Instant Messaging Server=10.0.1.5.0
Oracle Database=12.2.0.1
Oracle Database=19c
Oracle Database=21c
Oracle Graph Server And Client<21.3.0
Oracle Instantis Enterprisetrack=17.1
Oracle Instantis Enterprisetrack=17.2
Oracle Instantis Enterprisetrack=17.3
Oracle Managed File Transfer=12.2.1.3.0
Oracle Managed File Transfer=12.2.1.4.0
Oracle MySQL Enterprise Monitor<=8.0.23
Oracle Siebel UI Framework<21.9
Oracle Siebel UI Framework=21.9
debian/tomcat9
9.0.43-2~deb11u109.0.43-2~deb11u129.0.70-29.0.95-1
redhat/tomcat<10.0.2
10.0.2
redhat/tomcat<9.0.43
9.0.43
redhat/tomcat<8.5.63
8.5.63
redhat/tomcat<7.0.108
7.0.108
Oracle Agile Product Lifecycle Management=9.3.3
Oracle Agile Product Lifecycle Management=9.3.6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 0:4.12.0-3.redhat_2.2.el7
  2. Upgrade

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

    Fixed in 0:9.0.43-11.redhat_00011.1.el7
  3. Upgrade

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

    Fixed in 0:1.2.26-3.redhat_3.el7
  4. Upgrade

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

    Fixed in 0:1.1.8-2.Final_redhat_00003.1.el7
  5. Upgrade

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

    Fixed in 0:4.12.0-3.redhat_2.2.el8
  6. Upgrade

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

    Fixed in 0:9.0.43-11.redhat_00011.1.el8
  7. Upgrade

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

    Fixed in 0:1.2.26-3.redhat_3.el8
  8. Upgrade

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

    Fixed in 0:1.1.8-2.Final_redhat_00003.1.el8
  9. 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
  10. Upgrade

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

    Fixed in 10.0.2
  11. Upgrade

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

    Fixed in 9.0.43
  12. Upgrade

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

    Fixed in 8.5.63
  13. Upgrade

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

    Fixed in 7.0.108

Event History

Mar 1, 2021
CVE Published
12:00 AM
CVE Published
via MITRE·12:00 PM
Data Sourced
via MITRE·12:00 PM
DescriptionWeakness
Data Sourced
via NVD·12:15 PM
RemedyDescriptionSeverityAffected Software
Mar 2, 2021
Data Sourced
via Red Hat·12:09 PM
DescriptionSeverityAffected Software
Jan 11, 2024
Data Sourced
via Launchpad·11:54 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-2021-25329?

CVE-2021-25329 is a vulnerability in Apache Tomcat that allows remote attackers to execute arbitrary code or cause a denial of service.

2

How severe is CVE-2021-25329?

CVE-2021-25329 has a high severity rating with a CVSS score of 7.0.

3

Which versions of Apache Tomcat are affected by CVE-2021-25329?

CVE-2021-25329 affects Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41, 8.5.0 to 8.5.61, and 7.0.0 to 7.0.107.

4

How can I fix CVE-2021-25329?

To fix CVE-2021-25329, you should upgrade Apache Tomcat to version 10.0.2, 9.0.43, 8.5.63, or 7.0.108, depending on the affected version.

5

Where can I find more information about CVE-2021-25329?

You can find more information about CVE-2021-25329 at the following references: [Reference 1](https://access.redhat.com/security/cve/CVE-2020-9484), [Reference 2](https://github.com/apache/tomcat/commit/6d66e99ef85da93e4d2c2a536ca51aa3418bfaf4), [Reference 3](https://github.com/apache/tomcat/commit/4785433a226a20df6acbea49296e1ce7e23de453).

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