8.8
HIGH
CVE-2021-1309
Cisco Small Business RV Series Routers LLDP Multiple Vulnerabilities Disclosure
Description

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

INFO

Published Date :

April 8, 2021, 4:15 a.m.

Last Modified :

Nov. 7, 2023, 3:27 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2021-1309 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 rv340_firmware
2 Cisco rv340w_firmware
3 Cisco rv345_firmware
4 Cisco rv345p_firmware
5 Cisco rv132w_firmware
6 Cisco rv134w_firmware
7 Cisco rv160_firmware
8 Cisco rv160w_firmware
9 Cisco rv260_firmware
10 Cisco rv260p_firmware
11 Cisco rv260w_firmware
12 Cisco small_business_rv_series_router_firmware
: Total Affected Vendor : 1 | Products : 12
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-2021-1309.

URL Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe 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-2021-1309 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-1309 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:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
    Added CVSS V3.1 Cisco Systems, Inc. AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
  • Reanalysis by [email protected]

    Aug. 05, 2022

    Action Type Old Value New Value
    Added CWE NIST CWE-401
  • Initial Analysis by [email protected]

    Apr. 14, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:A/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe Vendor Advisory
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv132w_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv132w_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv132w_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv132w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv134w_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv134w_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv134w_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv134w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv160_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv160_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv160_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv160:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv160w_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv160w_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv160w_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv160w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv260_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv260_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv260_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv260:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv260p_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv260p_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv260p_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv260p:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv260w_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv260w_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv260w_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv260w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv340_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv340_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv340_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv340:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv340w_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv340w_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv340w_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv340w:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv345_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv345_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv345_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv345:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:rv345p_firmware:1.0.0.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv345p_firmware:1.0.1.14:*:*:*:*:*:*:* *cpe:2.3:o:cisco:rv345p_firmware:1.0.1.20:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:rv345p:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 08, 2021

    Action Type Old Value New Value
    Changed Description Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
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-2021-1309 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-2021-1309 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation
Exploit Prediction

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

0.08 }} 0.00%

score

0.34640

percentile

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