CVE-2021-1622
CVSS V2 Medium 4.3
CVSS V3 High 8.6
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.
Overview
- CVE ID
- CVE-2021-1622
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-23T03:15:13
- Last Modified Date
- 2021-11-23T13:10:46
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* | 1 | OR | 16.12.1z1 | |
| cpe:2.3:o:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:7600_router:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-12c-f-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-12c-ft-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-4c-f-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-4c-ft-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-6cz-f-a:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-6cz-f-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-6cz-fs-a:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-6cz-fs-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-6cz-ft-a:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_901-6cz-ft-d:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:cbr-8:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 8.6
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8-cops-Vc2ZsJSx | Patch Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-1622 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1622 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:45:21 | Added to TrackCVE | |||
| 2022-12-05 11:08:15 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-05 11:08:15 | 2021-09-23T03:15Z | 2021-09-23T03:15:13 | CVE Published Date | updated |
| 2022-12-05 11:08:15 | 2021-11-23T13:10:46 | CVE Modified Date | updated | |
| 2022-12-05 11:08:15 | Analyzed | Vulnerability Status | updated |