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CVE-2021-21305— Code Injection vulnerability in CarrierWave

Quick assessment

Affected
carrierwaveuploader carrierwave
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mshibuya CarrierWave是美国Mshibuya个人组织的一个上传工具。提供了一种简单且极为灵活的方式来从Ruby应用程序上传文件。 Mshibuya CarrierWave 1.3.2和2.1.1之前版本存在代码注入漏洞，该漏洞源于#manipulate!方法不恰当地求值了突变选项(:read/:write)的内容，从而允许攻击者创建一个可以作为Ruby代码执行的字符串。如果应用程序开发人员向该选项提供不受信任的输入，则会导致远程代码执行。

CVSS 7.4 · High EPSS 12.68% · P96

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-21305

Vulnerability Information
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Vulnerability Title
Code Injection vulnerability in CarrierWave
Source: CVE Program / CVE List V5
Vulnerability Description
CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1, there is a code injection vulnerability. The "#manipulate!" method inappropriately evals the content of mutation option(:read/:write), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE). This is fixed in versions 1.3.2 and 2.1.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Mshibuya CarrierWave 代码代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mshibuya CarrierWave是美国Mshibuya个人组织的一个上传工具。提供了一种简单且极为灵活的方式来从Ruby应用程序上传文件。 Mshibuya CarrierWave 1.3.2和2.1.1之前版本存在代码注入漏洞，该漏洞源于#manipulate!方法不恰当地求值了突变选项(:read/:write)的内容，从而允许攻击者创建一个可以作为Ruby代码执行的字符串。如果应用程序开发人员向该选项提供不受信任的输入，则会导致远程代码执行。
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
carrierwaveuploader carrierwave < 1.3.2 -

II. Public POCs for CVE-2021-21305

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III. Intelligence Information for CVE-2021-21305

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Patches & Fixes for CVE-2021-21305 (1)

Vendor Advisories for CVE-2021-21305 (1)

Other References for CVE-2021-21305 (3)

IV. Related Vulnerabilities

Same product: carrierwave
Same vendor: carrierwaveuploader
Same weakness: CWE-74