7.5
HIGH
CVE-2021-28505
Arista EOS VXLAN Protocol IP Address Resolution Denial of Service
Description

On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.

INFO

Published Date :

April 14, 2022, 9:15 p.m.

Last Modified :

Nov. 21, 2024, 5:59 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-28505 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Arista eos
2 Arista ccs-710p-12
3 Arista ccs-710p-16p
4 Arista ccs-720xp-24y6
5 Arista ccs-720xp-24zy4
6 Arista ccs-720xp-48y6
7 Arista ccs-720xp-48zc2
8 Arista ccs-720xp-96zc2
9 Arista ccs-722xpm-48y4
10 Arista ccs-722xpm-48zy8
11 Arista dcs-7010tx-48
12 Arista dcs-7050cx3-32s
13 Arista dcs-7050cx3m-32s
14 Arista dcs-7050sx3-48c8
15 Arista dcs-7050sx3-48yc12
16 Arista dcs-7050sx3-48yc8
17 Arista dcs-7050sx3-96yc8
18 Arista dcs-7050tx3-48c8
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-2021-28505.

URL Resource
https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073 Exploit Vendor Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073 Exploit 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-2021-28505 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-28505 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Apr. 26, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073 No Types Assigned https://www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073 Exploit, Vendor Advisory
    Added CWE NIST CWE-863
    Added CPE Configuration AND OR *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.26 up to (excluding) 4.26.4m *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.27 up to (excluding) 4.27.1f OR cpe:2.3:h:arista:ccs-710p-12:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-710p-16p:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-720xp-24y6:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-720xp-24zy4:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-720xp-48y6:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-720xp-48zc2:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-720xp-96zc2:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-722xpm-48y4:-:*:*:*:*:*:*:* cpe:2.3:h:arista:ccs-722xpm-48zy8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7010tx-48:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050cx3-32s:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050cx3m-32s:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050sx3-48c8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050sx3-48yc12:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050sx3-48yc8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050sx3-96yc8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:dcs-7050tx3-48c8:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-28505 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} 0.02%

score

0.40922

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability