CVE-2020-13943

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.

References

https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E

https://lists.debian.org/debian-lts-announce/2020/10/msg00019.html

https://security.netapp.com/advisory/ntap-20201016-0007/

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html

https://www.debian.org/security/2021/dsa-4835

https://www.oracle.com/security-alerts/cpuApr2021.html

Details

Source: MITRE

Published: 2020-10-12

Updated: 2021-06-14

Risk Information

CVSS v2

Base Score: 4

Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 8

Severity: MEDIUM

CVSS v3

Base Score: 4.3

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Impact Score: 1.4

Exploitability Score: 2.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:apache:tomcat:8.5.0:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.1:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.2:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.3:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.4:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.5:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.6:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.7:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.8:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.9:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.10:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.11:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.15:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.13:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.14:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.12:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.16:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.17:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.18:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.19:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.20:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.21:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.22:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.23:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.24:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.25:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.26:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.27:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.28:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.29:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.30:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.31:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.32:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.33:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.34:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.35:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.1:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.2:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.3:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone6:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone7:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone8:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.0:milestone9:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.36:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.37:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.38:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.39:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.40:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.41:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.42:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.43:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.44:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.45:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.46:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.47:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.48:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.49:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.50:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.51:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.52:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.53:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.54:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.55:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.56:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:8.5.57:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.4:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone3:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone4:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone2:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone1:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone5:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone6:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.5:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.6:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.7:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.8:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.9:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.10:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.11:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.12:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.13:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.14:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.15:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.16:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.17:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.18:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.19:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.20:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.21:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.22:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.23:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.24:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.25:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.26:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.27:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.28:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.29:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.30:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.31:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.32:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.33:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.34:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.35:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.36:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:9.0.37:*:*:*:*:*:*:*

cpe:2.3:a:apache:tomcat:10.0.0:milestone7:*:*:*:*:*:*

Configuration 2

OR

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Tenable Plugins

View all (16 total)

IDNameProductFamilySeverity
150935Apache Tomcat 10.0.0.M1 < 10.0.0.M8 vulnerabilityNessusWeb Servers
medium
148894Oracle Database Server Multiple Vulnerabilities (Apr 2021 CPU)NessusDatabases
medium
701332Apache Tomcat < 10.0.0-M8 VulnerabilityNessus Network MonitorWeb Servers
medium
146431RHEL 7 : Red Hat JBoss Web Server 5.4.1 Security Update (Moderate) (RHSA-2021:0494)NessusRed Hat Local Security Checks
high
145386Debian DSA-4835-1 : tomcat9 - security updateNessusDebian Local Security Checks
high
143063Photon OS 1.0: Apache PHSA-2020-1.0-0338NessusPhotonOS Local Security Checks
medium
142985Photon OS 2.0: Apache PHSA-2020-2.0-0295NessusPhotonOS Local Security Checks
medium
142655Photon OS 3.0: Apache PHSA-2020-3.0-0161NessusPhotonOS Local Security Checks
medium
142550openSUSE Security Update : tomcat (openSUSE-2020-1842)NessusSuSE Local Security Checks
medium
142186openSUSE Security Update : tomcat (openSUSE-2020-1799)NessusSuSE Local Security Checks
medium
142170EulerOS 2.0 SP8 : tomcat (EulerOS-SA-2020-2324)NessusHuawei Local Security Checks
medium
112629Apache Tomcat 8.5.x < 8.5.58 Information DisclosureWeb Application ScanningComponent Vulnerability
medium
112628Apache Tomcat 9.0.0.M1 < 9.0.38 Information DisclosureWeb Application ScanningComponent Vulnerability
medium
112627Apache Tomcat 10.0.0-M1 < 10.0.0-M8 Information DisclosureWeb Application ScanningComponent Vulnerability
medium
141466Debian DLA-2407-1 : tomcat8 security updateNessusDebian Local Security Checks
medium
141446Apache Tomcat 8.5.x < 8.5.58 / 9.0.x < 9.0.38 HTTP/2 Request Mix-UpNessusWeb Servers
medium