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CVE-2020-17527— Apache Tomcat: Request header mix-up between HTTP/2 streams

Quick assessment

Affected
Apache Software Foundation Apache Tomcat
Exploitation
Public or AI PoC available; prioritize validation
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 存在信息泄露漏洞，该漏洞源于可以重用HTTP 2连接上接收到的前一个流的HTTP请求头值，用于与后续流相关联的请求。虽然这很可能会导致错误和HTTP 2连接的关闭，但信息可能会在请求之间泄漏。以下产品及版本受到影响：10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8

AI Predicted 5.9 Difficulty: Theoretical EPSS 24.62% · P98
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I. Basic Information for CVE-2020-17527

Vulnerability Information
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Vulnerability Title
Apache Tomcat: Request header mix-up between HTTP/2 streams
Source: CVE Program / CVE List V5
Vulnerability Description
While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Tomcat 信息泄露漏洞
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 存在信息泄露漏洞，该漏洞源于可以重用HTTP 2连接上接收到的前一个流的HTTP请求头值，用于与后续流相关联的请求。虽然这很可能会导致错误和HTTP 2连接的关闭，但信息可能会在请求之间泄漏。以下产品及版本受到影响：10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8
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 Apache Tomcat 10 10.0.0-M1 to 10.0.0-M9 -

II. Public POCs for CVE-2020-17527

# POC Description Source Link Shenlong Link
1 None https://github.com/forse01/CVE-2020-17527-Tomcat POC Details
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III. Intelligence Information for CVE-2020-17527

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Vendor Advisories for CVE-2020-17527 (7)

Mailing List Discussions for CVE-2020-17527 (17)

IV. Related Vulnerabilities

Same product: Apache Tomcat
Same vendor: Apache Software Foundation
Same weakness: CWE-200

V. Comments for CVE-2020-17527

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