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CVE-2021-43980

nvd nist
Published: Sep 28, 2022Modified: Jun 17, 2026

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3.7
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Exploitability: 2.2 / Impact: 1.4
Source: NVD

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.

Affected (17)

Apache
1 product
Tomcat
Debian
1 product
Debian Linux
Configuration A
15 vulnerable
Vulnerable SoftwareAffected Versions
Apache
Tomcat
From 10.0.0 to 10.0.18
Tomcat
From 8.5.0 to 8.5.77
Tomcat
From 9.0.0 to 9.0.60
Tomcat
Version 10.1.0 milestone10
Tomcat
Version 10.1.0 milestone11
Tomcat
Version 10.1.0 milestone12
Tomcat
Version 10.1.0 milestone1
Tomcat
Version 10.1.0 milestone2
Tomcat
Version 10.1.0 milestone3
Tomcat
Version 10.1.0 milestone4
Tomcat
Version 10.1.0 milestone5
Tomcat
Version 10.1.0 milestone6
Tomcat
Version 10.1.0 milestone7
Tomcat
Version 10.1.0 milestone8
Tomcat
Version 10.1.0 milestone9
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Debian
Debian Linux
Version 10.0
Debian Linux
Version 11.0

Related CWEs

CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

References (8)

Source: security@apache.org
Mailing ListThird Party Advisory
Source: security@apache.org
Mailing ListVendor Advisory
Source: security@apache.org
Mailing ListThird Party Advisory
Source: security@apache.org
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

Timeline

No history available yet.