Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-3496

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
26/08/2020
Last modified:
19/10/2021

Description

A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.

Impact

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

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

Base Score 3.x
5.30
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:sg200-50_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-50:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-50p_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-50p:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-50fp_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-50fp:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-26_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-26:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-26p_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-26p:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-26fp_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-26fp:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-18_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)
cpe:2.3:h:cisco:sg200-18:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sg200-10fp_firmware:*:*:*:*:*:*:*:* 2.5.5.47 (including)

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


References to Advisories, Solutions, and Tools