CVE-2023-20191
"Cisco MPLS Interface ACL Bypass Vulnerability"
Description
A vulnerability in the access control list (ACL) processing on MPLS interfaces in the ingress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to incomplete support for this feature. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device. There are workarounds that address this vulnerability. This advisory is part of the September 2023 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2023 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication .
INFO
Published Date :
Sept. 13, 2023, 5:15 p.m.
Last Modified :
Jan. 25, 2024, 5:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
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-2023-20191.
| URL | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnx-acl-PyzDkeYF | 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-2023-20191 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-20191 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]
Jan. 25, 2024
Action Type Old Value New Value Added CWE Cisco Systems, Inc. CWE-284 -
CPE Deprecation Remap by [email protected]
Oct. 25, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:h:cisco:ios_xr:*:*:*:*:*:*:*:* versions from (excluding) 7.7.21 OR *cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions from (excluding) 7.7.21 -
CPE Deprecation Remap by [email protected]
Oct. 25, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:h:cisco:ios_xr:7.10:*:*:*:*:*:*:* OR *cpe:2.3:o:cisco:ios_xr:7.10:*:*:*:*:*:*:* -
CPE Deprecation Remap by [email protected]
Oct. 25, 2023
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:h:cisco:ios_xr:*:*:*:*:*:*:*:* versions from (including) 7.8 from (excluding) 7.9.2 OR *cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions from (including) 7.8 from (excluding) 7.9.2 -
Initial Analysis by [email protected]
Sep. 19, 2023
Action Type Old Value New Value 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://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnx-acl-PyzDkeYF No Types Assigned https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnx-acl-PyzDkeYF Vendor Advisory Added CWE NIST CWE-863 Added CPE Configuration OR *cpe:2.3:h:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (excluding) 7.7.21 *cpe:2.3:h:cisco:ios_xr:*:*:*:*:*:*:*:* versions from (including) 7.8 up to (excluding) 7.9.2 *cpe:2.3:h:cisco:ios_xr:7.10:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-20191 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-2023-20191
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.03%
score
0.41342
percentile