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CVE-2021-43980— Apache Tomcat: Information disclosure

Quick assessment

Affected
Apache Software Foundation Apache Tomcat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。该程序实现了对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat存在安全漏洞，该漏洞源于阻塞读写的简化实现，存在并发错误，该错误可能导致客户端连接共享一个Http11Processor实例，从而导致响应或者部分响应，由错误的客户接收。以下产品和版本受到影响：Tomcat 10.1.0-M1至10.1.0-M12版本、10.0.0-M1至10.0.18版本、9.0.0-M1至9

AI Predicted 7.5 Difficulty: Hard EPSS 2.36% · P83

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2021-43980

Vulnerability Information
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Vulnerability Title
Apache Tomcat: Information disclosure
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Tomcat 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。该程序实现了对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat存在安全漏洞，该漏洞源于阻塞读写的简化实现，存在并发错误，该错误可能导致客户端连接共享一个Http11Processor实例，从而导致响应或者部分响应，由错误的客户接收。以下产品和版本受到影响：Tomcat 10.1.0-M1至10.1.0-M12版本、10.0.0-M1至10.0.18版本、9.0.0-M1至9
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Tomcat 10.1.0-M1 to 10.1.0-M12 -

II. Public POCs for CVE-2021-43980

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III. Intelligence Information for CVE-2021-43980

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Vendor Advisories for CVE-2021-43980 (1)

Mailing List Discussions for CVE-2021-43980 (3)

IV. Related Vulnerabilities

Same product: Apache Tomcat
Same vendor: Apache Software Foundation
Same weakness: CWE-362

V. Comments for CVE-2021-43980

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