VDB
CVE-2020-11996
CVE-2020-11996
PUBLISHED
A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0 to 10.0.0, 9.0.0 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.
EPSS 45.12% · 97.7th percentile
Risk Scores
EPSS Score
45.12%
97.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bitnami | tomcat | 8.5.0, 9.0.0, 8.5.0 |
| Bitnami | tomcat | 8.5.0, 9.0.0 |
Exploit Intelligence
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
- tomcat-embed-core-9.0.31 CVE-2020-11996 Test PoC (github-poc-repo)
…and 28 more exploits
Timeline
- CVE Published
- Apr 14, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
- Dec 17, 2024 EPSS Score
- Mar 19, 2025 EPSS Score
- Mar 23, 2025 EPSS Score
- Mar 27, 2025 EPSS Score
- Mar 29, 2025 EPSS Score
- Apr 3, 2025 EPSS Score
- Apr 9, 2025 EPSS Score
- May 1, 2025 EPSS Score
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00064.html url
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00072.html url
- https://lists.apache.org/thread.html/r2529016c311ce9485e6f173446d469600fdfbb94dccadfcd9dfdac79%40%3Cusers.tomcat.apache.org%3E url
- https://lists.apache.org/thread.html/r3ea96d8f36dd404acce83df8aeb22a9e807d6c13ca9c5dec72f872cd%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r5541ef6b6b68b49f76fc4c45695940116da2bcbe0312ef204a00a2e0%40%3Cannounce.tomcat.apache.org%3E url
- https://lists.apache.org/thread.html/r5a4f80a6acc6607d61dae424b643b594c6188dd4e1eff04705c10db2%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r6c29801370a36c1a5159679269777ad0c73276d3015b8bbefea66e5c%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r74f5a8204efe574cbfcd95b2a16236fe95beb45c4d9fee3dc789dca9%40%3Ccommits.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r8f3d416c193bc9384a8a7dd368623d441f5fcaff1057115008100561%40%3Ccommits.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r8f7484589454638af527182ae55ef5b628ba00c05c5b11887c922fb1%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r93ca628ef3a4530dfe5ac49fddc795f0920a4b2a408b57a30926a42b%40%3Ccommits.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/r9ad911fe49450ed9405827af0e7a74104041081ff91864b1f2546bbd%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628ba86c51f15efb38f5853e2760%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/rb4ee49ecc4c59620ffd5e66e84a17e526c2c3cfa95d0cd682d90d338%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/rb820f1a2a02bf07414be12c653c2ab5321fd87b9bf6c5e635c53ff4b%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/rc80b96b4b96618b2b7461cb90664a428cfd6605eea9f74e51b792542%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/rea65d6ef2e45dd1c45faae83922042732866c7b88fa109b76c83db52%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.apache.org/thread.html/ref0339792ac6dac1dba83c071a727ad72380899bde60f6aaad4031b9%40%3Cnotifications.ofbiz.apache.org%3E url
- https://lists.debian.org/debian-lts-announce/2020/07/msg00010.html url
- https://security.netapp.com/advisory/ntap-20200709-0002/ url
…and 5 more