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    CVE-2021-4242

    A vulnerability was found in Sapido BR270n, BRC76n, GR297 and RB1732 and classified as critical. Affected by this issue is some unknown functionality of the file ip/syscmd.htm. The manipulation leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-214592.

    Published:Nov 30, 2022
    Last Modified:Apr 15, 2025
    EPS:Nov 30, 2022
    EPSS Score:0.00916
    CVSS Score:6.3

    Affected Products

    Vendor
    Sapido
    Product
    Br270n
    Vendor
    Sapido
    Product
    Br270n Firmware
    Vendor
    Sapido
    Product
    Brc76n
    Vendor
    Sapido
    Product
    Brc76n Firmware
    Vendor
    Sapido
    Product
    Gr297n
    Vendor
    Sapido
    Product
    Gr297n Firmware
    Vendor
    Sapido
    Product
    Rb-1732
    Vendor
    Sapido
    Product
    Rb-1732 Firmware

    Exploits

    https://blog.csdn.net/qq_44159028/article/details/114590267https://github.com/smallpiggy/Sapido--rce/blob/main/Sapido%E8%B7%AF%E7%94%B1%E5%99%A8-rce.pyhttps://blog.csdn.net/qq_44159028/article/details/114590267https://github.com/smallpiggy/Sapido--rce/blob/main/Sapido%E8%B7%AF%E7%94%B1%E5%99%A8-rce.py

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-15 Command Delimiters
    CAPEC-250 XML Injection
    CAPEC-276 Inter-component Protocol Manipulation
    CAPEC-277 Data Interchange Protocol Manipulation
    CAPEC-278 Web Services Protocol Manipulation
    CAPEC-279 SOAP Manipulation
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-468 Generic Cross-Browser Cross-Domain Theft
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-7 Blind SQL Injection
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-83 XPath Injection
    CAPEC-84 XQuery Injection
    CAPEC-88 OS Command Injection

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High