Cisco IOS XR Access Control List access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$5k-$25k0.00

Summaryinfo

A vulnerability was found in Cisco IOS XR. It has been declared as critical. The impacted element is an unknown function of the component Access Control List Handler. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2023-20191. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS XR (Router Operating System) (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the component Access Control List Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect integrity. CVE summarizes:

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 .

The weakness was released 09/14/2023 as cisco-sa-dnx-acl-PyzDkeYF. The advisory is available at sec.cloudapps.cisco.com. This vulnerability was named CVE-2023-20191 since 10/27/2022. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/11/2023). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.8
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
09/14/2023 +322 days 🔍
09/14/2023 +0 days 🔍
10/11/2023 +27 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-dnx-acl-PyzDkeYF
Status: Confirmed

CVE: CVE-2023-20191 (🔍)
GCVE (CVE): GCVE-0-2023-20191
GCVE (VulDB): GCVE-100-239686
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 09/14/2023 07:16
Updated: 10/11/2023 15:30
Changes: 09/14/2023 07:16 (50), 10/11/2023 15:30 (11)
Complete: 🔍
Cache ID: 216::103

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