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CVE-2023-28846— Unpoly 资源管理错误漏洞

一分钟漏洞结论

影响对象
unpoly unpoly-rails
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Unpoly是一个用于服务器端Web应用程序的JavaScript框架。 Unpoly 2.7.2.2之前版本存在资源管理错误漏洞，该漏洞源于存在拒绝服务 (DoS) 漏洞。

CVSS 5.9 · Medium EPSS 1.03% · P64
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一、 漏洞 CVE-2023-28846 基础信息

漏洞信息
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Vulnerability Title
Denial of Service in unpoly-rails
来源: CVE Program / CVE List V5
Vulnerability Description
Unpoly is a JavaScript framework for server-side web applications. There is a possible Denial of Service (DoS) vulnerability in the `unpoly-rails` gem that implements the Unpoly server protocol for Rails applications. This issues affects Rails applications that operate as an upstream of a load balancer's that uses passive health checks. The `unpoly-rails` gem echoes the request URL as an `X-Up-Location` response header. By making a request with exceedingly long URLs (paths or query string), an attacker can cause unpoly-rails to write a exceedingly large response header. If the response header is too large to be parsed by a load balancer downstream of the Rails application, it may cause the load balancer to remove the upstream from a load balancing group. This causes that application instance to become unavailable until a configured timeout is reached or until an active healthcheck succeeds. This issue has been fixed and released as version 2.7.2.2 which is available via RubyGems and GitHub. Users unable to upgrade may: Configure your load balancer to use active health checks, e.g. by periodically requesting a route with a known response that indicates healthiness; Configure your load balancer so the maximum size of response headers is at least twice the maximum size of a URL; or instead of changing your server configuration you may also configure your Rails application to delete redundant `X-Up-Location` headers set by unpoly-rails.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
来源: CVE Program / CVE List V5
Vulnerability Title
Unpoly 资源管理错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Unpoly是一个用于服务器端Web应用程序的JavaScript框架。 Unpoly 2.7.2.2之前版本存在资源管理错误漏洞，该漏洞源于存在拒绝服务 (DoS) 漏洞。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
unpoly unpoly-rails < 2.7.2.2 -

二、漏洞 CVE-2023-28846 的公开POC

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三、漏洞 CVE-2023-28846 的情报信息

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CVE-2023-28846 补丁与修复 (1)

CVE-2023-28846 厂商安全公告 (1)

CVE-2023-28846 其他参考 (5)

IV. Related Vulnerabilities

Same weakness: CWE-400