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CVE-2023-36478— HTTP/2 HPACK integer overflow and buffer allocation

Quick assessment

Affected
eclipse jetty.project
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.

Eclipse Jetty是Eclipse基金会的一个开源的、基于Java的Web服务器和Java Servlet容器。 Eclipse Jetty存在资源管理错误漏洞，该漏洞源于组件MetaDataBuilder.checkSize存在整数溢出漏洞。受影响的产品和版本：Eclipse Jetty 11.0.0至11.0.15版本，10.0.0至10.0.15版本，9.0.0至9.4.52版本。

CVSS 7.5 · High EPSS 3.75% · P90

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-36478

Vulnerability Information
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Vulnerability Title
HTTP/2 HPACK integer overflow and buffer allocation
Source: CVE Program / CVE List V5
Vulnerability Description
Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in `MetaDataBuilder.checkSize` allows for HTTP/2 HPACK header values to exceed their size limit. `MetaDataBuilder.java` determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295 will overflow, and length will become negative. `(_size+length)` will now be negative, and the check on line 296 will not be triggered. Furthermore, `MetaDataBuilder.checkSize` allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and this length value is a very large positive number when multiplied by 2, then the user can cause a very large buffer to be allocated on the server. Users of HTTP/2 can be impacted by a remote denial of service attack. The issue has been fixed in versions 11.0.16, 10.0.16, and 9.4.53. There are no known workarounds.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse Jetty 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eclipse Jetty是Eclipse基金会的一个开源的、基于Java的Web服务器和Java Servlet容器。 Eclipse Jetty存在资源管理错误漏洞，该漏洞源于组件MetaDataBuilder.checkSize存在整数溢出漏洞。受影响的产品和版本：Eclipse Jetty 11.0.0至11.0.15版本，10.0.0至10.0.15版本，9.0.0至9.4.52版本。
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
eclipse jetty.project >= 10.0.0, < 10.0.16 -

II. Public POCs for CVE-2023-36478

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III. Intelligence Information for CVE-2023-36478

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Vendor Advisories for CVE-2023-36478 (4)

Mailing List Discussions for CVE-2023-36478 (2)

Other References for CVE-2023-36478 (3)

IV. Related Vulnerabilities

Same product: jetty.project
Same vendor: eclipse
Same weakness: CWE-190

V. Comments for CVE-2023-36478

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