CVE-2020-13943

medium

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