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AUSCERT External Security Bulletin Redistribution
ESB-2020.2409
Apache Tomcat fixes a pair of DoS vulnerabilities
16 July 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Tomcat
Publisher: Apache
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-13935 CVE-2020-13934
Original Bulletin:
http://mail-archives.us.apache.org/mod_mbox/www-announce/202007.mbox/%3Cad62f54e-8fd7-e326-25f1-3bdf1ffa3818%40apache.org%3E
http://mail-archives.us.apache.org/mod_mbox/www-announce/202007.mbox/%3C39e4200c-6f4e-b85d-fe4b-a9c2bd5fdc3d%40apache.org%3E
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CVE-2020-13934 Apache Tomcat HTTP/2 Denial of Service
Severity: Moderate
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0-M6
Apache Tomcat 9.0.0.M5 to 9.0.36
Apache Tomcat 8.5.1 to 8.5.56
Description:
An h2c direct connection did not release the HTTP/1.1 processor after
the upgrade to HTTP/2. If a sufficient number of such requests were
made, an OutOfMemoryException could occur leading to a denial of service.
Mitigation:
- - Upgrade to Apache Tomcat 10.0.0-M7 or later
- - Upgrade to Apache Tomcat 9.0.37 or later
- - Upgrade to Apache Tomcat 8.5.57 or later
Credit:
This issue was reported publicly via the Apache Tomcat Users mailing
list without reference to the potential for DoS. The DoS risks were
identified by the Apache Tomcat Security Team.
References:
[1] http://tomcat.apache.org/security-10.html
[2] http://tomcat.apache.org/security-9.html
[3] http://tomcat.apache.org/security-8.html
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CVE-2020-13935 Apache Tomcat WebSocket Denial of Service
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0-M6
Apache Tomcat 9.0.0.M1 to 9.0.36
Apache Tomcat 8.5.0 to 8.5.56
Apache Tomcat 7.0.27 to 7.0.104
Description:
The payload length in a WebSocket frame was not correctly validated.
Invalid payload lengths could trigger an infinite loop. Multiple
requests with invalid payload lengths could lead to a denial of service.
Mitigation:
- - Upgrade to Apache Tomcat 10.0.0-M7 or later
- - Upgrade to Apache Tomcat 9.0.37 or later
- - Upgrade to Apache Tomcat 8.5.57 or later
Credit:
This issue was reported publicly via the Apache Tomcat Users mailing
list without reference to the potential for DoS. The DoS risks were
identified by the Apache Tomcat Security Team.
References:
[1] http://tomcat.apache.org/security-10.html
[2] http://tomcat.apache.org/security-9.html
[3] http://tomcat.apache.org/security-8.html
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