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                             CERT-Renater

                 Note d'Information No. 2021/VULN129
_____________________________________________________________________

DATE                : 03/03/2021

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Apache Tomcat versions prior to
                          10.0.2, 9.0.43, 8.5.63, 7.0.108.

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http://mail-archives.apache.org/mod_mbox/tomcat-announce/202103.mbox/%3cb7626398-5e6d-1639-4e9e-e41b34af84de@apache.org%3e
http://mail-archives.apache.org/mod_mbox/tomcat-announce/202103.mbox/%3c811bba77-e74e-9f9b-62ca-5253a09ba84f@apache.org%3e
_____________________________________________________________________


CVE-2021-25122 h2c request mix-up

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0
Apache Tomcat 9.0.0.M1 to 9.0.41
Apache Tomcat 8.5.0 to 8.5.61

Description:
When responding to new h2c connection requests, Apache Tomcat could
duplicate request headers and a limited amount of request body from one
request to another meaning user A and user B could both see the results
of user A's request.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 10.0.2 or later
- Upgrade to Apache Tomcat 9.0.43 or later
- Upgrade to Apache Tomcat 8.5.63 or later

Note that issue was fixed in 10.0.1, 9.0.42 and 8.5.62 but the release
votes for those versions did not pass.

Credit:
This issue was identified by the Apache Tomcat Security Team.

History:
2021-03-01 Original advisory

References:
[1] https://tomcat.apache.org/security-10.html
[2] https://tomcat.apache.org/security-9.html
[3] https://tomcat.apache.org/security-8.html
[4] https://tomcat.apache.org/security-7.html

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CVE-2021-25329 Incomplete fix for CVE-2020-9484 (RCE via session
persistence)


Severity: Low

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0
Apache Tomcat 9.0.0.M1 to 9.0.41
Apache Tomcat 8.5.0 to 8.5.61
Apache Tomcat 7.0.0 to 7.0.107

Description:
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 also apply to this issue.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 10.0.2 or later
- Upgrade to Apache Tomcat 9.0.43 or later
- Upgrade to Apache Tomcat 8.5.63 or later
- Upgrade to Apache Tomcat 7.0.108 or later
- the the previously published non-upgrade mitigations for CVE-2020-9484
      also apply to this issue

Note that issue was fixed in 10.0.1, 9.0.42 and 8.5.62 but the release
votes for those versions did not pass.

Credit:
This issue was identified by Trung Pham of Viettel Cyber Security.

History:
2021-03-01 Original advisory

References:
[1] https://tomcat.apache.org/security-10.html
[2] https://tomcat.apache.org/security-9.html
[3] https://tomcat.apache.org/security-8.html
[4] https://tomcat.apache.org/security-7.html




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+ CERT-RENATER       |    tel : 01-53-94-20-44          +
+ 23/25 Rue Daviel   |    fax : 01-53-94-20-41          +
+ 75013 Paris        |    email:cert@support.renater.fr +
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