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CVE-2021-43980

Public on 2022-09-28
Modified on 2024-03-08
Description

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Severity
Low
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CVSS v3 Base Score
3.7
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Tomcat8.5 Extra tomcat 2023-08-21 20:58 ALAS2TOMCAT8.5-2023-013
Amazon Linux 2 - Tomcat9 Extra tomcat 2023-08-21 20:58 ALAS2TOMCAT9-2023-005
Amazon Linux 1 tomcat8 2023-04-13 19:01 ALAS-2023-1732
Amazon Linux 2023 tomcat9 2023-04-27 20:00 ALAS2023-2023-176

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD CVSSv3 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N