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[email protected]CVE-2023-20191

HistorySep 13, 2023 - 5:15 p.m.

CVE-2023-20191

2023-09-1317:15:09

CWE-284

CWE-863

[email protected]

web.nvd.nist.gov

vulnerability

acl

mpls

cisco ios xr software

unauthenticated

remote attackers

bypass

workarounds

nvd

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

30.4%

JSON

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 .

Affected configurations

NVD

Node

ciscoios_xrRange<7.7.21

ciscoios_xrRange7.8–7.9.2

ciscoios_xrMatch7.10

CPENameOperatorVersion
cisco:ios_xrcisco ios xrlt7.7.21
cisco:ios_xrcisco ios xrlt7.9.2
cisco:ios_xrcisco ios xreq7.10

CPE	Name	Operator	Version
cisco:ios_xr	cisco ios xr	lt	7.7.21
cisco:ios_xr	cisco ios xr	lt	7.9.2
cisco:ios_xr	cisco ios xr	eq	7.10

CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco IOS XR Software",
    "versions": [
      {
        "version": "6.4.1",
        "status": "affected"
      },
      {
        "version": "6.5.1",
        "status": "affected"
      },
      {
        "version": "6.5.2",
        "status": "affected"
      },
      {
        "version": "6.5.3",
        "status": "affected"
      },
      {
        "version": "6.6.2",
        "status": "affected"
      },
      {
        "version": "6.6.3",
        "status": "affected"
      },
      {
        "version": "6.6.25",
        "status": "affected"
      },
      {
        "version": "6.6.4",
        "status": "affected"
      },
      {
        "version": "7.0.1",
        "status": "affected"
      },
      {
        "version": "7.0.2",
        "status": "affected"
      },
      {
        "version": "7.1.1",
        "status": "affected"
      },
      {
        "version": "7.1.2",
        "status": "affected"
      },
      {
        "version": "7.2.1",
        "status": "affected"
      },
      {
        "version": "7.2.2",
        "status": "affected"
      },
      {
        "version": "7.3.1",
        "status": "affected"
      },
      {
        "version": "7.3.2",
        "status": "affected"
      },
      {
        "version": "7.3.3",
        "status": "affected"
      },
      {
        "version": "7.3.5",
        "status": "affected"
      },
      {
        "version": "7.4.1",
        "status": "affected"
      },
      {
        "version": "7.4.2",
        "status": "affected"
      },
      {
        "version": "7.5.1",
        "status": "affected"
      },
      {
        "version": "7.5.3",
        "status": "affected"
      },
      {
        "version": "7.5.2",
        "status": "affected"
      },
      {
        "version": "7.5.4",
        "status": "affected"
      },
      {
        "version": "7.6.1",
        "status": "affected"
      },
      {
        "version": "7.6.2",
        "status": "affected"
      },
      {
        "version": "7.7.1",
        "status": "affected"
      },
      {
        "version": "7.7.2",
        "status": "affected"
      },
      {
        "version": "7.8.1",
        "status": "affected"
      },
      {
        "version": "7.8.2",
        "status": "affected"
      },
      {
        "version": "7.9.1",
        "status": "affected"
      }
    ]
  }
]