High severity · published Jul 14, 2020
CVE-2020-13935
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104
7.5
CVSS
86.6%
EPSS
No
On KEV
Description
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)86.6% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tomcat · Apache
Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56, 7.0.27 to 7.0.104 · source: vendor, NVD
AE
Agile Engineering Data Management · Oracle
6.2.1.0 · source: NVD
AP
Agile Product Lifecycle Management · Oracle
9.3.3; 9.3.5; 9.3.6 · source: NVD
BP
Blockchain Platform · Oracle
before 21.1.2 · source: NVD
CG
Commerce Guided Search · Oracle
11.3.2 · source: NVD
CC
Communications Cloud Native Core Policy · Oracle
1.14.0 · source: NVD
CI
Communications Instant Messaging Server · Oracle
10.0.1.5.0 · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
EO
Epolicy Orchestrator · Mcafee
5.9.0; 5.9.1; 5.10.0; 5.10.0; 5.10.0; 5.10.0; +5 more · source: NVD
FP
Fmw Platform · Oracle
12.2.1.3.0; 12.2.1.4.0 · source: NVD
IE
Instantis Enterprisetrack · Oracle
17.1; 17.2; 17.3 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13935
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-13935
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.html
Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10332
lists.apache.org
https://lists.apache.org/thread.html/r4e5d3c09f4dd2923191e972408b40fb8b42dbff0bc7904d44b651e50%40%3Cusers.tomcat.apache.org%3E
Mailing List
https://lists.apache.org/thread.html/rd48c72bd3255bda87564d4da3791517c074d94f8a701f93b85752651%40%3Cannounce.tomcat.apache.org%3E
Mailing List
https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html
More from Tomcat
9.8
CVE-2025-24813
Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT
9.8
CVE-2020-1938
Apache Tomcat Improper Privilege Management Vulnerability
9.8
CVE-2016-8735
Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x before 9.0.0.M12 if…
8.1
CVE-2017-12617
When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g
8.1
CVE-2017-12615
When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g