7.2
HIGH
CVE-2021-1336
Cisco Small Business Router HTTP Input Validation Vulnerability
Description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. These vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.

INFO

Published Date :

Feb. 4, 2021, 5:15 p.m.

Last Modified :

Nov. 7, 2023, 3:28 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

1.2
Affected Products

The following products are affected by CVE-2021-1336 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco small_business_rv_series_router_firmware
2 Cisco rv016_multi-wan_vpn_router_firmware
3 Cisco rv042_dual_wan_vpn_router_firmware
4 Cisco rv042g_dual_gigabit_wan_vpn_router_firmware
5 Cisco rv082_dual_wan_vpn_router_firmware
6 Cisco rv320_dual_gigabit_wan_vpn_router_firmware
7 Cisco rv325_dual_gigabit_wan_vpn_router_firmware
: Total Affected Vendor : 1 | Products : 7
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-1336.

URL Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-1336 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-1336 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
    Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Initial Analysis by [email protected]

    Feb. 05, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj Vendor Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv016_multi-wan_vpn_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.2.3.14 OR cpe:2.3:h:cisco:rv016_multi-wan_vpn_router:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv042_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.2.3.14 OR cpe:2.3:h:cisco:rv042_dual_wan_vpn_router:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv042g_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.2.3.14 OR cpe:2.3:h:cisco:rv042g_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv082_dual_wan_vpn_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 4.2.3.14 OR cpe:2.3:h:cisco:rv082_dual_wan_vpn_router:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv320_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.5.1.11 OR cpe:2.3:h:cisco:rv320_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv325_dual_gigabit_wan_vpn_router_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.5.1.11 OR cpe:2.3:h:cisco:rv325_dual_gigabit_wan_vpn_router:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-1336 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-1336 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.21 }} -0.01%

score

0.59548

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: