CVE-2021-0224
Juniper Networks Junos OS ANCPD Denial of Service
Description
A vulnerability in the handling of internal resources necessary to bring up a large number of Layer 2 broadband remote access subscriber (BRAS) nodes in Juniper Networks Junos OS can cause the Access Node Control Protocol daemon (ANCPD) to crash and restart, leading to a Denial of Service (DoS) condition. Continued processing of spoofed subscriber nodes will create a sustained Denial of Service (DoS) condition. When the number of subscribers attempting to connect exceeds the configured maximum-discovery-table-entries value, the subscriber fails to map to an internal neighbor entry, causing the ANCPD process to crash. This issue affects Juniper Networks Junos OS: All versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2.
INFO
Published Date :
April 22, 2021, 8:15 p.m.
Last Modified :
July 23, 2021, 7:04 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
2.8
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-2021-0224.
| URL | Resource |
|---|---|
| https://kb.juniper.net/JSA11119 | 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-2021-0224 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-0224 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 -
Reanalysis by [email protected]
Jul. 23, 2021
Action Type Old Value New Value Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V2 NIST (AV:A/AC:L/Au:N/C:N/I:N/A:P) Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CVSS V3.1 NIST AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
Initial Analysis by [email protected]
Apr. 27, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://kb.juniper.net/JSA11119 No Types Assigned https://kb.juniper.net/JSA11119 Vendor Advisory Added CWE NIST CWE-770 Added CPE Configuration OR *cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r1-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r2-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r2-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r2-s5:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r3:-:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r3-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:17.3:r3-s10:*:*:*:*:*:* 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CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-0224 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-2021-0224
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.01%
score
0.22873
percentile