Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-34779

Severity CVSS v4.0:
Pending analysis
Type:
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
06/10/2021
Last modified:
07/11/2023

Description

Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following: Execute code on the affected device or cause it to reload unexpectedly Cause LLDP database corruption on the 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). Cisco has released firmware updates that address these vulnerabilities.

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH
Vector 2.0
AV:A/AC:M/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.90 HIGH
Vector: AV:A/AC:M/Au:N/C:C/I:C/A:C

Attack Vector (AV): Adjacent
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
7.90
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:business_220-8t-e-2g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-8t-e-2g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-8p-e-2g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-8p-e-2g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-8fp-e-2g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-8fp-e-2g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-16t-2g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-16t-2g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-16p-2g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-16p-2g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-24t-4g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-24t-4g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-24p-4g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)
cpe:2.3:h:cisco:business_220-24p-4g:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:business_220-24fp-4g_firmware:*:*:*:*:*:*:*:* 1.2.0.6 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools