CVE-2020-13943
Public on 2020-10-12
Modified on 2023-06-01
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.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Tomcat8.5 Extra | tomcat | 2023-08-21 | ALAS2TOMCAT8.5-2023-011 | Fixed |
| Amazon Linux 1 | tomcat7 | No Fix Planned | ||
| Amazon Linux 1 | tomcat8 | No Fix Planned | ||
| Amazon Linux 1 | tomcat80 | No Fix Planned | ||
| Amazon Linux 2023 | tomcat9 | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | CVSSv2 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
| NVD | CVSSv3 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |