CVE-2020-11996

HIGHScheduled

Published:Jun 26, 2020(5 years ago)

Modified:Nov 21, 2024

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability Description

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

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No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
apache	tomcat	8.5.0 - 8.5.55	-
apache	tomcat	9.0.0 - 9.0.35	-
apache	tomcat	-

Timeline

Published
CVE disclosed publicly
Jun 26, 20205 years ago
Last Modified
Most recent update
Nov 21, 20241 year ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00064....Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00072....Mailing List
https://lists.apache.org/thread.html/r2529016c311ce9485e6f173446d46960...

CVSS Score

v3.1

7.5/ 10.0

HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At a Glance

Affected Products

References

apache / tomcat

https://lists.apache.org/thread.html/r3ea96d8f36dd404acce83df8aeb22a9e...

https://lists.apache.org/thread.html/r5541ef6b6b68b49f76fc4c4569594011...Mailing List

https://lists.apache.org/thread.html/r5a4f80a6acc6607d61dae424b643b594...

https://lists.apache.org/thread.html/r6c29801370a36c1a5159679269777ad0...

https://lists.apache.org/thread.html/r74f5a8204efe574cbfcd95b2a16236fe...

https://lists.apache.org/thread.html/r8f3d416c193bc9384a8a7dd368623d44...

https://lists.apache.org/thread.html/r8f7484589454638af527182ae55ef5b6...

https://lists.apache.org/thread.html/r93ca628ef3a4530dfe5ac49fddc795f0...

https://lists.apache.org/thread.html/r9ad911fe49450ed9405827af0e7a7410...

https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628b...

https://lists.apache.org/thread.html/rb4ee49ecc4c59620ffd5e66e84a17e52...

https://lists.apache.org/thread.html/rb820f1a2a02bf07414be12c653c2ab53...

https://lists.apache.org/thread.html/rc80b96b4b96618b2b7461cb90664a428...

https://lists.apache.org/thread.html/rea65d6ef2e45dd1c45faae8392204273...

https://lists.apache.org/thread.html/ref0339792ac6dac1dba83c071a727ad7...

https://lists.debian.org/debian-lts-announce/2020/07/msg00010.htmlMailing List

https://security.netapp.com/advisory/ntap-20200709-0002/Third Party Advisory

https://usn.ubuntu.com/4596-1/Third Party Advisory

https://www.debian.org/security/2020/dsa-4727Third Party Advisory

https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory

https://www.oracle.com/security-alerts/cpuoct2020.htmlThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00064....Mailing List

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00072....Mailing List

https://lists.apache.org/thread.html/r2529016c311ce9485e6f173446d46960...