Cisco Small Business RV Series Router Link Layer Discovery Protocol memory corruption

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6.0$0-$5k0.58

A vulnerability, which was classified as critical, has been found in Cisco Small Business RV Series Router (Router Operating System) (affected version not known). Affected by this issue is some unknown functionality of the component Link Layer Discovery Protocol. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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).

The weakness was disclosed 04/08/2021 as cisco-sa-rv-multi-lldp-u7e4chCe. The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2021-1251 since 11/13/2020. The exploitation is known to be easy. The attack can only be initiated within the local network. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/11/2021).

Upgrading eliminates this vulnerability.

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VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

11/13/2020 CVE assigned
04/08/2021 +145 days Advisory disclosed
04/08/2021 +0 days VulDB entry created
04/11/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.cisco.com/

Advisory: cisco-sa-rv-multi-lldp-u7e4chCe
Status: Confirmed

CVE: CVE-2021-1251 (🔒)

Entryinfoedit

Created: 04/08/2021 10:16 AM
Updated: 04/11/2021 06:04 PM
Changes: (1) source_cve_cna
Complete: 🔍

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