// For flags

CVE-2022-20753

Cisco Small Business RV Series Routers Remote Code Execution Vulnerability

Severity Score

7.2
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A vulnerability in web-based management interface of Cisco Small Business RV340 and RV345 Routers could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to an affected device. A successful exploit could allow the attacker to execute remote code on the affected device. To exploit this vulnerability, an attacker would need to have valid Administrator credentials on the affected device.

Una vulnerabilidad en la interfaz de administración basada en la web de los routers Cisco Small Business RV340 y RV345 podría permitir a un atacante remoto autenticado ejecutar código arbitrario en un dispositivo afectado. Esta vulnerabilidad es debido a que no se ha comprobado suficientemente la entrada proporcionada por el usuario. Un atacante podría aprovechar esta vulnerabilidad mediante el envío de entradas maliciosas a un dispositivo afectado. Una explotación con éxito podría permitir al atacante ejecutar código remoto en el dispositivo afectado. Para aprovechar esta vulnerabilidad, un atacante necesitaría tener credenciales de administrador válidas en el dispositivo afectado

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Cisco RV340 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.
The specific flaw exists within the handling of set-snmp JSON RPC requests. When parsing the usmUserPrivKey parameter, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the www-data user.

*Credits: Anonymous
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-02 CVE Reserved
  • 2022-05-04 CVE Published
  • 2024-08-23 EPSS Updated
  • 2024-09-16 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-121: Stack-based Buffer Overflow
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cisco
Search vendor "Cisco"
Rv340 Firmware
Search vendor "Cisco" for product "Rv340 Firmware"
< 1.0.03.27
Search vendor "Cisco" for product "Rv340 Firmware" and version " < 1.0.03.27"
-
Affected
in Cisco
Search vendor "Cisco"
Rv340
Search vendor "Cisco" for product "Rv340"
--
Safe
Cisco
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Rv340w Firmware
Search vendor "Cisco" for product "Rv340w Firmware"
< 1.0.03.27
Search vendor "Cisco" for product "Rv340w Firmware" and version " < 1.0.03.27"
-
Affected
in Cisco
Search vendor "Cisco"
Rv340w
Search vendor "Cisco" for product "Rv340w"
--
Safe
Cisco
Search vendor "Cisco"
Rv345 Firmware
Search vendor "Cisco" for product "Rv345 Firmware"
< 1.0.03.27
Search vendor "Cisco" for product "Rv345 Firmware" and version " < 1.0.03.27"
-
Affected
in Cisco
Search vendor "Cisco"
Rv345
Search vendor "Cisco" for product "Rv345"
--
Safe
Cisco
Search vendor "Cisco"
Rv345p Firmware
Search vendor "Cisco" for product "Rv345p Firmware"
< 1.0.03.27
Search vendor "Cisco" for product "Rv345p Firmware" and version " < 1.0.03.27"
-
Affected
in Cisco
Search vendor "Cisco"
Rv345p
Search vendor "Cisco" for product "Rv345p"
--
Safe