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

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2021-1622

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/09/2021
Last modified:
07/11/2023

Description

A vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition. This vulnerability is due to a deadlock condition in the code when processing COPS packets under certain conditions. An attacker could exploit this vulnerability by sending COPS packets with high burst rates to an affected device. A successful exploit could allow the attacker to cause the CPU to consume excessive resources, which prevents other control plane processes from obtaining resources and results in a DoS.

Impact

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

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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): High

Base Score 3.x
8.60
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

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

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 16.12.1z1 (excluding)
cpe:2.3:o:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:*
cpe:2.3:h:cisco:7600_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-12c-f-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-12c-ft-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-4c-f-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-4c-ft-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-6cz-f-a:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-6cz-f-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-6cz-fs-a:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-6cz-fs-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-6cz-ft-a:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_901-6cz-ft-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:cbr-8:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools