CVE-2021-28511
Arista EOS Security ACL Bypass Vulnerability
Description
This advisory documents the impact of an internally found vulnerability in Arista EOS for security ACL bypass. The impact of this vulnerability is that the security ACL drop rule might be bypassed if a NAT ACL rule filter with permit action matches the packet flow. This could allow a host with an IP address in a range that matches the range allowed by a NAT ACL and a range denied by a Security ACL to be forwarded incorrectly as it should have been denied by the Security ACL. This can enable an ACL bypass.
INFO
Published Date :
Aug. 5, 2022, 5:15 p.m.
Last Modified :
Nov. 21, 2024, 5:59 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
2.5
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-28511
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.
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-2021-28511.
| URL | Resource |
|---|---|
| https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078 | Exploit Mitigation Vendor Advisory |
| https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078 | Exploit Mitigation 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-2021-28511 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-28511 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-advisory/15862-security-advisory-0078 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Aug. 15, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Changed Reference Type https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078 No Types Assigned https://www.arista.com/en/support/advisories-notices/security-advisory/15862-security-advisory-0078 Exploit, Mitigation, Vendor Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration AND OR *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions up to (including) 4.24.9 *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.25.0 up to (including) 4.25.8 *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.26.0 up to (including) 4.26.5 *cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:* versions from (including) 4.27.0 up to (including) 4.27.3 OR cpe:2.3:h:arista:7050cx3-32s:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050cx3m-32s:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050sx3-48c8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050sx3-48yc:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050sx3-48yc12:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050sx3-48yc8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050sx3-96yc8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7050tx3-48c8:-:*:*:*:*:*:*:* cpe:2.3:h:arista:720xp-24y6:-:*:*:*:*:*:*:* cpe:2.3:h:arista:720xp-24zy4:-:*:*:*:*:*:*:* cpe:2.3:h:arista:720xp-48y6:-:*:*:*:*:*:*:* cpe:2.3:h:arista:720xp-48zc2:-:*:*:*:*:*:*:* cpe:2.3:h:arista:720xp-96zc2:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7300x3-32c:-:*:*:*:*:*:*:* cpe:2.3:h:arista:7300x3-48yc4:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-28511 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-2021-28511
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.00%
score
0.38456
percentile