Cisco IOS XR Access Control List access control

CVSS Meta Temp Score
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CTI Interest Score
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5.4$5k-$25k0.00

Summaryinfo

A vulnerability was found in Cisco IOS XR. It has been rated as critical. This affects an unknown function of the component Access Control List Handler. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2023-20190. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Cisco IOS XR (Router Operating System) (version unknown). It has been rated as critical. This issue affects an unknown function of the component Access Control List Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is integrity. The summary by CVE is:

A vulnerability in the classic access control list (ACL) compression feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass the protection that is offered by a configured ACL on an affected device. This vulnerability is due to incorrect destination address range encoding in the compression module of an ACL that is applied to an interface of an affected device. An attacker could exploit this vulnerability by sending traffic through the affected device that should be denied by the configured ACL. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device, allowing the attacker to access trusted networks that the device might be protecting. 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 disclosed 09/14/2023 as cisco-sa-comp3acl-vGmp6BQ3. It is possible to read the advisory at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2023-20190 since 10/27/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/11/2023). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.3
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-comp3acl-vGmp6BQ3
Status: Confirmed

CVE: CVE-2023-20190 (🔍)
GCVE (CVE): GCVE-0-2023-20190
GCVE (VulDB): GCVE-100-239687
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 09/14/2023 07:16
Updated: 10/11/2023 15:36
Changes: 09/14/2023 07:16 (50), 10/11/2023 15:36 (9)
Complete: 🔍
Cache ID: 216::103

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