Security Bulletin: Apache Tomcat could allow a remote attacker to obtain sensitive information (CVE-2021-43980)

Summary

Apache Tomcat could allow a remote attacker to obtain sensitive information, caused by a long standing concurrency flaw in the simplified implementation of blocking reads and writes. By sending a specially-crafted request, an attacker could exploit this vulnerability to obtain Http11Processor instance information, and use this information to launch further attacks against the affected system.

Vulnerability Details

CVEID:CVE-2021-43980
**DESCRIPTION:**Apache Tomcat could allow a remote attacker to obtain sensitive information, caused by a long standing concurrency flaw in the simplified implementation of blocking reads and writes. By sending a specially-crafted request, an attacker could exploit this vulnerability to obtain Http11Processor instance information, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/237447 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Remediation/Fixes

Upgrade to any of 6.2.7.16, 7.0.5.11, 7.1.2.7, 7.2.3.0 or higher.

Workarounds and Mitigations

None