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CVE-2020-13943

Published: Oct 12, 2020Updated: Nov 21, 2024 Sources: CVE List NVD GHSANVD-CWE-noinfo
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
57.3%
Top 1.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

tomcatapache
On-premWeb App
Networking Infrastructure / load-balancer-proxy
debian linuxdebian
On-premOS
Operating Systems / linux-distro
instantis enterprisetrackoracle
On-premWeb App
Enterprise Software / itsm-monitoring
sd-wan edgeoracle
On-premNetwork Device
Networking Infrastructure / router-switch
org.apache.tomcat:tomcat-coyoteMavenOSS Libraries
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
debianoss-projectGBOperating Systemsaka debian gnu/linux
oraclecommercialUSDatabasesaka oracle corp.
mavenpackage-ecosystemOSS Libraries
and 1 more affected products View all →

Exploitability

Official Patch Available

References

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html
lists.opensuse.org
https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E
lists.apache.org
and 9 more references View all →

Timeline

Published
Oct 12, 2020
Last Updated
Nov 21, 2024

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