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CVE-2022-23634— Information Exposure when using Puma with Rails

Quick assessment

Affected
puma puma
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.

Puma是美国Evan Phoenix个人开发者的一款针对高并发应用的Web服务器。 Puma 存在信息泄露漏洞，该漏洞源于在puma版本5.6.2之前，puma可能并不总是在响应体上调用close，在版本7.0.2.2之前，Rails依赖于关闭响应体，以便其“CurrentAttributes”实现正确工作。这两种行为(Puma不关闭主体+ Rails的Executor实现)的结合会导致信息泄漏。

CVSS 8.0 · High EPSS 2.11% · P80

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2022-23634

Vulnerability Information
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Vulnerability Title
Information Exposure when using Puma with Rails
Source: CVE Program / CVE List V5
Vulnerability Description
Puma is a Ruby/Rack web server built for parallelism. Prior to `puma` version `5.6.2`, `puma` may not always call `close` on the response body. Rails, prior to version `7.0.2.2`, depended on the response body being closed in order for its `CurrentAttributes` implementation to work correctly. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. This problem is fixed in Puma versions 5.6.2 and 4.3.11. This problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. Upgrading to a patched Rails _or_ Puma version fixes the vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Puma 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Puma是美国Evan Phoenix个人开发者的一款针对高并发应用的Web服务器。 Puma 存在信息泄露漏洞，该漏洞源于在puma版本5.6.2之前，puma可能并不总是在响应体上调用close，在版本7.0.2.2之前，Rails依赖于关闭响应体，以便其“CurrentAttributes”实现正确工作。这两种行为(Puma不关闭主体+ Rails的Executor实现)的结合会导致信息泄漏。
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
puma puma >= 5.0.0, < 5.6.2 -

II. Public POCs for CVE-2022-23634

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III. Intelligence Information for CVE-2022-23634

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Patches & Fixes for CVE-2022-23634 (1)

Vendor Advisories for CVE-2022-23634 (3)

Mailing List Discussions for CVE-2022-23634 (4)

Other References for CVE-2022-23634 (3)

IV. Related Vulnerabilities

Same product: puma
Same vendor: puma
Same weakness: CWE-200

V. Comments for CVE-2022-23634

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