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CVE-2020-36321— Directory traversal in development mode handler in Vaadin 14 and 15-17

Quick assessment

Affected
Vaadin Vaadin
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.

Vaadin flow是一个应用软件。Vaadin平台的Java框架，用于构建外观美观，性能良好并让您和您的用户感到满意的现代网站。 vaadin:flow-server versions 2.0.0版本至2.4.1版本存在路径遍历漏洞，该漏洞允许攻击者请求存储在预期的前端资源文件夹外部的任意文件。

CVSS 5.9 · Medium EPSS 1.21% · P67
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I. Basic Information for CVE-2020-36321

Vulnerability Information
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Vulnerability Title
Directory traversal in development mode handler in Vaadin 14 and 15-17
Source: CVE Program / CVE List V5
Vulnerability Description
Improper URL validation in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.4.1 (Vaadin 14.0.0 through 14.4.2), and 3.0 prior to 5.0 (Vaadin 15 prior to 18) allows attacker to request arbitrary files stored outside of intended frontend resources folder.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Vaadin flow 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vaadin flow是一个应用软件。Vaadin平台的Java框架，用于构建外观美观，性能良好并让您和您的用户感到满意的现代网站。 vaadin:flow-server versions 2.0.0版本至2.4.1版本存在路径遍历漏洞，该漏洞允许攻击者请求存储在预期的前端资源文件夹外部的任意文件。
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
Vaadin Vaadin 14.0.0 ~ * -
Vaadin flow-server 2.0.0 ~ * -

II. Public POCs for CVE-2020-36321

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III. Intelligence Information for CVE-2020-36321

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Patches & Fixes for CVE-2020-36321 (1)

Other References for CVE-2020-36321 (1)

Same Patch Batch · Vaadin · 2021-04-23 · 13 CVEs total

CVE-2021-31407 8.6 HIGH Server classes and resources exposure in OSGi applications using Vaadin 12-14 and 19
CVE-2021-31410 8.6 HIGH Project sources exposure in Vaadin Designer
CVE-2020-36320 7.5 HIGH Regular expression Denial of Service (ReDoS) in EmailValidator class in Vaadin 7
CVE-2021-31405 7.5 HIGH Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-1
CVE-2021-31408 6.3 MEDIUM Server session is not invalidated when logout() helper method of Authentication module is
CVE-2019-25027 6.1 MEDIUM Reflected cross-site scripting in default RouteNotFoundError view in Vaadin 10 and 11-13
CVE-2019-25028 5.4 MEDIUM Stored cross-site scripting in Grid component in Vaadin 7 and 8
CVE-2021-31403 4.0 MEDIUM Timing side channel vulnerability in UIDL request handler in Vaadin 7 and 8
CVE-2021-31404 4.0 MEDIUM Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18
CVE-2021-31406 4.0 MEDIUM Timing side channel vulnerability in endpoint request handler in Vaadin 15-19
CVE-2020-36319 3.1 LOW Potential sensitive data exposure in applications using Vaadin 15
CVE-2018-25007 2.6 LOW Unauthorized client-side property update in UIDL request handler in Vaadin 10 and 11

IV. Related Vulnerabilities

Same product: Vaadin
Same vendor: Vaadin
Same weakness: CWE-22

V. Comments for CVE-2020-36321

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