module

Cisco Small Business RV Series Authentication Bypass and Command Injection

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Disclosed
2021-04-07
Created
2022-02-01

Description

This module exploits an authentication bypass (CVE-2021-1472) and command injection (CVE-2021-1473)
in the Cisco Small Business RV series of VPN/routers. The device does not adequately verify the
credentials in the HTTP Authorization field when requests are made to the /upload endpoint. Then
the upload.cgi binary will use the contents of the HTTP Cookie field as part of a `curl` request
aimed at an internal endpoint. The curl request is executed using `popen` and allows the attacker
to inject commands via the Cookie field.

A remote and unauthenticated attacker using this module is able to achieve code execution as `www-data`.

This module affects the RV340, RV340w, RV345, and RV345P using firmware versions 1.0.03.20 and below.

Authors

Takeshi Shiomitsu
jbaines-r7

Platform

Linux,Unix

Architectures

cmd, armle

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/linux/http/cisco_rv_series_authbypass_and_rce
    msf exploit(cisco_rv_series_authbypass_and_rce) > show targets
        ...targets...
    msf exploit(cisco_rv_series_authbypass_and_rce) > set TARGET < target-id >
    msf exploit(cisco_rv_series_authbypass_and_rce) > show options
        ...show and set options...
    msf exploit(cisco_rv_series_authbypass_and_rce) > exploit
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