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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
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CVSS v3 Base Score
4.3
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Tomcat8.5 Extra tomcat 2023-08-21 20:58 ALAS2TOMCAT8.5-2023-011

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

References

Red Hat: CVE-2020-13943 Mitre: CVE-2020-13943 FAQs regarding Amazon Linux ALAS/CVE Severity