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CVE-2021-26605— unidocs ezPDFReader arbitrary command execution vulnerability

Quick assessment

Affected
unidocs ezPDFReader
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.

ezPDF是一款手机PDF阅读器。它可以帮助用户们去搜索手机里的所有PDF文件,并且可以帮助用户快速打开这些PDF文件进行查看。 ezPDF Reader 2.0至3.0版本存在输入验证错误漏洞，该漏洞源于在ezPDFReader的服务中存在一个不正确的输入验证漏洞，允许攻击者可利用该漏洞执行任意命令。当ezPDF启动器通过JSON-RPC通信接收和执行手工输入值时，会发生这个问题。

CVSS 7.5 · High EPSS 1.05% · P63

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-26605

Vulnerability Information
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Vulnerability Title
unidocs ezPDFReader arbitrary command execution vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
An improper input validation vulnerability in the service of ezPDFReader allows attacker to execute arbitrary command. This issue occurred when the ezPDF launcher received and executed crafted input values through JSON-RPC communication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
ezPDF 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ezPDF是一款手机PDF阅读器。它可以帮助用户们去搜索手机里的所有PDF文件,并且可以帮助用户快速打开这些PDF文件进行查看。 ezPDF Reader 2.0至3.0版本存在输入验证错误漏洞，该漏洞源于在ezPDFReader的服务中存在一个不正确的输入验证漏洞，允许攻击者可利用该漏洞执行任意命令。当ezPDF启动器通过JSON-RPC通信接收和执行手工输入值时，会发生这个问题。
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
unidocs ezPDFReader 2.0 ~ 3.0 -

II. Public POCs for CVE-2021-26605

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III. Intelligence Information for CVE-2021-26605

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IV. Related Vulnerabilities

Same vendor: unidocs
Same weakness: CWE-20

V. Comments for CVE-2021-26605

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