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CVE-2021-35032

Quick assessment

Affected
Zyxel GS1900 series firmware
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.

Zyxel ZyXEL GS1900是中国台湾合勤（Zyxel）公司的一款管理型交换机。 Zyxel GS1900 中存在操作系统命令注入漏洞，该漏洞源于产品的libsal.so文件内的函数存在漏洞，攻击者可通过该漏洞调用函数执行任意系统命令。以下产品及版本受到影响：Zyxel GS1900 系列产品。

CVSS 6.4 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-35032

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbitrary OS commands via a crafted function call.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel GS1900 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel ZyXEL GS1900是中国台湾合勤（Zyxel）公司的一款管理型交换机。 Zyxel GS1900 中存在操作系统命令注入漏洞，该漏洞源于产品的libsal.so文件内的函数存在漏洞，攻击者可通过该漏洞调用函数执行任意系统命令。以下产品及版本受到影响：Zyxel GS1900 系列产品。
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
Zyxel GS1900 series firmware 2.60 -

II. Public POCs for CVE-2021-35032

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III. Intelligence Information for CVE-2021-35032

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Other References for CVE-2021-35032 (1)

IV. Related Vulnerabilities

Same product: GS1900 series firmware
Same vendor: Zyxel
Same weakness: CWE-78

V. Comments for CVE-2021-35032

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