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Vulnerability · Published Sep 28, 2022 · Assigned by apache

CVE-2021-43980Apache Tomcat: Information disclosure

Low 3.7

In plain English

A low-severity race condition in Apache Tomcat from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)2.4%top 16.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12tomcat99.0.62-1DEBIAN-CVE-2021-43980
Debian:13tomcat99.0.62-1DEBIAN-CVE-2021-43980
Debian:14tomcat99.0.62-1DEBIAN-CVE-2021-43980
Mavenorg.apache.tomcat:tomcat8.5.78GHSA-jx7c-7mj5-9438
Mavenorg.apache.tomcat:tomcat10.1.0-M14GHSA-jx7c-7mj5-9438
Mavenorg.apache.tomcat:tomcat9.0.62GHSA-jx7c-7mj5-9438
Mavenorg.apache.tomcat:tomcat10.0.20GHSA-jx7c-7mj5-9438

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Tomcat 10.1.0-M1 to 10.1.0-M1210.0.0-M1 to 10.0.189.0.0-M1 to 9.0.608.5.0 to 8.5.77

Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References