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CVE-2020-37278— Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFile

Quick assessment

Affected
Weaver e-Bridge
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.

Weaver e-Bridge 存在一个未认证的任意文件读取漏洞，攻击者可以通过向 saveYZJFile 端点的 downloadUrl 参数提供 file: URL，从而远程访问主机系统上的任意文件。攻击者可利用此漏洞读取敏感文件，例如 /etc/passwd、配置文件和凭证文件。此外，同一端点对 http(s) URL 的支持还允许攻击者针对内部网络资源实施服务器端请求伪造（SSRF）。该漏洞的利用证据最早由 Shadowserver Foundation 于 2023 年 10 月 17 日观察到。

CVSS 7.5 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
Weaver e-Bridge * affected
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I. Basic Information for CVE-2020-37278

Vulnerability Information
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Vulnerability Title
Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFile
Source: CVE Program / CVE List V5
Vulnerability Description
Weaver e-Bridge contains an unauthenticated arbitrary file read vulnerability that allows remote attackers to access arbitrary files on the host system by supplying a file: URL to the downloadUrl parameter of the saveYZJFile endpoint. Attackers can exploit this flaw to read sensitive files such as /etc/passwd or configuration and credential files, and the same endpoint's support for http(s) URLs also enables server-side request forgery against internal network resources. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Weaver e-Bridge * -

II. Public POCs for CVE-2020-37278

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III. Intelligence Information for CVE-2020-37278

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Vendor Advisories for CVE-2020-37278 (1)

Proof of Concept for CVE-2020-37278 (1)

Vendor Pages for CVE-2020-37278 (1)

IV. Related Vulnerabilities

Same vendor: Weaver
Same weakness: CWE-918

V. Comments for CVE-2020-37278

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