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CVE-2021-21384— Null characters not escaped in shescape

Quick assessment

Affected
ericcornelissen shescape
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.

shescape是开源的一个用于JavaScript的简单外壳转义程序包。使用它可以将用户控制的输入转义给shell命令，以防止shell注入。 shescape before version 1.1.3 存在参数注入漏洞，攻击者可利用该漏洞将a插入有效负载中，则使用_Shescape_防御shell注入的任何人可能容易受到shell注入的攻击。

CVSS 6.3 · Medium EPSS 0.58% · P46

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-21384

Vulnerability Information
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Vulnerability Title
Null characters not escaped in shescape
Source: CVE Program / CVE List V5
Vulnerability Description
shescape is a simple shell escape package for JavaScript. In shescape before version 1.1.3, anyone using _Shescape_ to defend against shell injection may still be vulnerable against shell injection if the attacker manages to insert a into the payload. For an example see the referenced GitHub Security Advisory. The problem has been patched in version 1.1.3. No further changes are required.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
shescape 参数注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
shescape是开源的一个用于JavaScript的简单外壳转义程序包。使用它可以将用户控制的输入转义给shell命令，以防止shell注入。 shescape before version 1.1.3 存在参数注入漏洞，攻击者可利用该漏洞将a插入有效负载中，则使用_Shescape_防御shell注入的任何人可能容易受到shell注入的攻击。
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
ericcornelissen shescape < 1.1.3 -

II. Public POCs for CVE-2021-21384

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III. Intelligence Information for CVE-2021-21384

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Patches & Fixes for CVE-2021-21384 (1)

Vendor Advisories for CVE-2021-21384 (1)

Other References for CVE-2021-21384 (2)

IV. Related Vulnerabilities

Same product: shescape
Same vendor: ericcornelissen
Same weakness: CWE-88

V. Comments for CVE-2021-21384

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