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

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CVE-2021-1377

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/03/2021
Last modified:
07/11/2023

Description

A vulnerability in Address Resolution Protocol (ARP) management of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent an affected device from resolving ARP entries for legitimate hosts on the connected subnets. This vulnerability exists because ARP entries are mismanaged. An attacker could exploit this vulnerability by continuously sending traffic that results in incomplete ARP entries. A successful exploit could allow the attacker to cause ARP requests on the device to be unsuccessful for legitimate hosts, resulting in a denial of service (DoS) condition.

Impact

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

Base Score: 5.80 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

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

Base Score 3.x
5.80
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:ios:12.2\(6\)i1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svr1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svr2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svr3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(3\)svs1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e7:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e7b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e9a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)e10:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)e5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)e4:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools