CVE-2021-1622
"Cisco cBR-8 Converged Broadband Routers COPS Deadlock Denial of Service"
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.
INFO
Published Date :
Sept. 23, 2021, 3:15 a.m.
Last Modified :
Nov. 7, 2023, 3:28 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-1622.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8-cops-Vc2ZsJSx | Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-1622 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-1622 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H -
Reanalysis by [email protected]
Nov. 23, 2021
Action Type Old Value New Value Changed CPE Configuration AND OR *cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (excluding) 16.12.1z1 *cpe:2.3:a:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:* OR 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:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (excluding) 16.12.1z1 *cpe:2.3:o:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:* OR 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:-:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Sep. 30, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8-cops-Vc2ZsJSx No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8-cops-Vc2ZsJSx Patch, Vendor Advisory Added CWE NIST CWE-667 Added CPE Configuration AND OR *cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (excluding) 16.12.1z1 *cpe:2.3:a:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:* OR 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:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-1622 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-1622
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.16 }} 0.02%
score
0.52604
percentile