CVE-2023-20198

2023-10-1616:15:10

CWE-420

[email protected]

web.nvd.nist.gov

345

In Wild

cisco

cve-2023-20198

cve-2023-20273

web ui

exploitation

security update

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.6 High

AI Score

Confidence

High

0.853 High

EPSS

Percentile

98.6%

JSON

Cisco is providing an update for the ongoing investigation into observed exploitation of the web UI feature in Cisco IOS XE Software. We are updating the list of fixed releases and adding the Software Checker. Our investigation has determined that the actors exploited two previously unknown issues. The attacker first exploited CVE-2023-20198 to gain initial access and issued a privilege 15 command to create a local user and password combination. This allowed the user to log in with normal user access. The attacker then exploited another component of the web UI feature, leveraging the new local user to elevate privilege to root and write the implant to the file system. Cisco has assigned CVE-2023-20273 to this issue. CVE-2023-20198 has been assigned a CVSS Score of 10.0. CVE-2023-20273 has been assigned a CVSS Score of 7.2. Both of these CVEs are being tracked by CSCwh87343.

Affected configurations

NVD

Node

ciscoios_xeRange16.12–16.12.10a

ciscoios_xeRange17.3–17.3.8a

ciscoios_xeRange17.6–17.6.6a

ciscoios_xeRange17.9–17.9.4a

CPENameOperatorVersion
cisco:ios_xecisco ios xelt16.12.10a
cisco:ios_xecisco ios xelt17.3.8a
cisco:ios_xecisco ios xelt17.6.6a
cisco:ios_xecisco ios xelt17.9.4a

CPE	Name	Operator	Version
cisco:ios_xe	cisco ios xe	lt	16.12.10a
cisco:ios_xe	cisco ios xe	lt	17.3.8a
cisco:ios_xe	cisco ios xe	lt	17.6.6a
cisco:ios_xe	cisco ios xe	lt	17.9.4a

CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco IOS XE Software",
    "versions": [
      {
        "version": "16.1.1",
        "status": "affected"
      },
      {
        "version": "16.1.2",
        "status": "affected"
      },
      {
        "version": "16.1.3",
        "status": "affected"
      },
      {
        "version": "16.2.1",
        "status": "affected"
      },
      {
        "version": "16.2.2",
        "status": "affected"
      },
      {
        "version": "16.3.1",
        "status": "affected"
      },
      {
        "version": "16.3.2",
        "status": "affected"
      },
      {
        "version": "16.3.3",
        "status": "affected"
      },
      {
        "version": "16.3.1a",
        "status": "affected"
      },
      {
        "version": "16.3.4",
        "status": "affected"
      },
      {
        "version": "16.3.5",
        "status": "affected"
      },
      {
        "version": "16.3.5b",
        "status": "affected"
      },
      {
        "version": "16.3.6",
        "status": "affected"
      },
      {
        "version": "16.3.7",
        "status": "affected"
      },
      {
        "version": "16.3.8",
        "status": "affected"
      },
      {
        "version": "16.3.9",
        "status": "affected"
      },
      {
        "version": "16.3.10",
        "status": "affected"
      },
      {
        "version": "16.3.11",
        "status": "affected"
      },
      {
        "version": "16.4.1",
        "status": "affected"
      },
      {
        "version": "16.4.2",
        "status": "affected"
      },
      {
        "version": "16.4.3",
        "status": "affected"
      },
      {
        "version": "16.5.1",
        "status": "affected"
      },
      {
        "version": "16.5.1a",
        "status": "affected"
      },
      {
        "version": "16.5.1b",
        "status": "affected"
      },
      {
        "version": "16.5.2",
        "status": "affected"
      },
      {
        "version": "16.5.3",
        "status": "affected"
      },
      {
        "version": "16.6.1",
        "status": "affected"
      },
      {
        "version": "16.6.2",
        "status": "affected"
      },
      {
        "version": "16.6.3",
        "status": "affected"
      },
      {
        "version": "16.6.4",
        "status": "affected"
      },
      {
        "version": "16.6.5",
        "status": "affected"
      },
      {
        "version": "16.6.4a",
        "status": "affected"
      },
      {
        "version": "16.6.5a",
        "status": "affected"
      },
      {
        "version": "16.6.6",
        "status": "affected"
      },
      {
        "version": "16.6.7",
        "status": "affected"
      },
      {
        "version": "16.6.8",
        "status": "affected"
      },
      {
        "version": "16.6.9",
        "status": "affected"
      },
      {
        "version": "16.6.10",
        "status": "affected"
      },
      {
        "version": "16.7.1",
        "status": "affected"
      },
      {
        "version": "16.7.1a",
        "status": "affected"
      },
      {
        "version": "16.7.1b",
        "status": "affected"
      },
      {
        "version": "16.7.2",
        "status": "affected"
      },
      {
        "version": "16.7.3",
        "status": "affected"
      },
      {
        "version": "16.7.4",
        "status": "affected"
      },
      {
        "version": "16.8.1",
        "status": "affected"
      },
      {
        "version": "16.8.1a",
        "status": "affected"
      },
      {
        "version": "16.8.1b",
        "status": "affected"
      },
      {
        "version": "16.8.1s",
        "status": "affected"
      },
      {
        "version": "16.8.1c",
        "status": "affected"
      },
      {
        "version": "16.8.1d",
        "status": "affected"
      },
      {
        "version": "16.8.2",
        "status": "affected"
      },
      {
        "version": "16.8.1e",
        "status": "affected"
      },
      {
        "version": "16.8.3",
        "status": "affected"
      },
      {
        "version": "16.9.1",
        "status": "affected"
      },
      {
        "version": "16.9.2",
        "status": "affected"
      },
      {
        "version": "16.9.1a",
        "status": "affected"
      },
      {
        "version": "16.9.1b",
        "status": "affected"
      },
      {
        "version": "16.9.1s",
        "status": "affected"
      },
      {
        "version": "16.9.3",
        "status": "affected"
      },
      {
        "version": "16.9.4",
        "status": "affected"
      },
      {
        "version": "16.9.3a",
        "status": "affected"
      },
      {
        "version": "16.9.5",
        "status": "affected"
      },
      {
        "version": "16.9.5f",
        "status": "affected"
      },
      {
        "version": "16.9.6",
        "status": "affected"
      },
      {
        "version": "16.9.7",
        "status": "affected"
      },
      {
        "version": "16.9.8",
        "status": "affected"
      },
      {
        "version": "16.10.1",
        "status": "affected"
      },
      {
        "version": "16.10.1a",
        "status": "affected"
      },
      {
        "version": "16.10.1b",
        "status": "affected"
      },
      {
        "version": "16.10.1s",
        "status": "affected"
      },
      {
        "version": "16.10.1c",
        "status": "affected"
      },
      {
        "version": "16.10.1e",
        "status": "affected"
      },
      {
        "version": "16.10.1d",
        "status": "affected"
      },
      {
        "version": "16.10.2",
        "status": "affected"
      },
      {
        "version": "16.10.1f",
        "status": "affected"
      },
      {
        "version": "16.10.1g",
        "status": "affected"
      },
      {
        "version": "16.10.3",
        "status": "affected"
      },
      {
        "version": "16.11.1",
        "status": "affected"
      },
      {
        "version": "16.11.1a",
        "status": "affected"
      },
      {
        "version": "16.11.1b",
        "status": "affected"
      },
      {
        "version": "16.11.2",
        "status": "affected"
      },
      {
        "version": "16.11.1s",
        "status": "affected"
      },
      {
        "version": "16.12.1",
        "status": "affected"
      },
      {
        "version": "16.12.1s",
        "status": "affected"
      },
      {
        "version": "16.12.1a",
        "status": "affected"
      },
      {
        "version": "16.12.1c",
        "status": "affected"
      },
      {
        "version": "16.12.1w",
        "status": "affected"
      },
      {
        "version": "16.12.2",
        "status": "affected"
      },
      {
        "version": "16.12.1y",
        "status": "affected"
      },
      {
        "version": "16.12.2a",
        "status": "affected"
      },
      {
        "version": "16.12.3",
        "status": "affected"
      },
      {
        "version": "16.12.8",
        "status": "affected"
      },
      {
        "version": "16.12.2s",
        "status": "affected"
      },
      {
        "version": "16.12.1x",
        "status": "affected"
      },
      {
        "version": "16.12.1t",
        "status": "affected"
      },
      {
        "version": "16.12.4",
        "status": "affected"
      },
      {
        "version": "16.12.3s",
        "status": "affected"
      },
      {
        "version": "16.12.3a",
        "status": "affected"
      },
      {
        "version": "16.12.4a",
        "status": "affected"
      },
      {
        "version": "16.12.5",
        "status": "affected"
      },
      {
        "version": "16.12.6",
        "status": "affected"
      },
      {
        "version": "16.12.1z1",
        "status": "affected"
      },
      {
        "version": "16.12.5a",
        "status": "affected"
      },
      {
        "version": "16.12.5b",
        "status": "affected"
      },
      {
        "version": "16.12.1z2",
        "status": "affected"
      },
      {
        "version": "16.12.6a",
        "status": "affected"
      },
      {
        "version": "16.12.7",
        "status": "affected"
      },
      {
        "version": "16.12.9",
        "status": "affected"
      },
      {
        "version": "16.12.10",
        "status": "affected"
      },
      {
        "version": "17.1.1",
        "status": "affected"
      },
      {
        "version": "17.1.1a",
        "status": "affected"
      },
      {
        "version": "17.1.1s",
        "status": "affected"
      },
      {
        "version": "17.1.1t",
        "status": "affected"
      },
      {
        "version": "17.1.3",
        "status": "affected"
      },
      {
        "version": "17.2.1",
        "status": "affected"
      },
      {
        "version": "17.2.1r",
        "status": "affected"
      },
      {
        "version": "17.2.1a",
        "status": "affected"
      },
      {
        "version": "17.2.1v",
        "status": "affected"
      },
      {
        "version": "17.2.2",
        "status": "affected"
      },
      {
        "version": "17.2.3",
        "status": "affected"
      },
      {
        "version": "17.3.1",
        "status": "affected"
      },
      {
        "version": "17.3.2",
        "status": "affected"
      },
      {
        "version": "17.3.3",
        "status": "affected"
      },
      {
        "version": "17.3.1a",
        "status": "affected"
      },
      {
        "version": "17.3.1w",
        "status": "affected"
      },
      {
        "version": "17.3.2a",
        "status": "affected"
      },
      {
        "version": "17.3.1x",
        "status": "affected"
      },
      {
        "version": "17.3.1z",
        "status": "affected"
      },
      {
        "version": "17.3.4",
        "status": "affected"
      },
      {
        "version": "17.3.5",
        "status": "affected"
      },
      {
        "version": "17.3.4a",
        "status": "affected"
      },
      {
        "version": "17.3.6",
        "status": "affected"
      },
      {
        "version": "17.3.4b",
        "status": "affected"
      },
      {
        "version": "17.3.4c",
        "status": "affected"
      },
      {
        "version": "17.3.5a",
        "status": "affected"
      },
      {
        "version": "17.3.5b",
        "status": "affected"
      },
      {
        "version": "17.3.7",
        "status": "affected"
      },
      {
        "version": "17.3.8",
        "status": "affected"
      },
      {
        "version": "17.4.1",
        "status": "affected"
      },
      {
        "version": "17.4.2",
        "status": "affected"
      },
      {
        "version": "17.4.1a",
        "status": "affected"
      },
      {
        "version": "17.4.1b",
        "status": "affected"
      },
      {
        "version": "17.4.2a",
        "status": "affected"
      },
      {
        "version": "17.5.1",
        "status": "affected"
      },
      {
        "version": "17.5.1a",
        "status": "affected"
      },
      {
        "version": "17.5.1b",
        "status": "affected"
      },
      {
        "version": "17.5.1c",
        "status": "affected"
      },
      {
        "version": "17.6.1",
        "status": "affected"
      },
      {
        "version": "17.6.2",
        "status": "affected"
      },
      {
        "version": "17.6.1w",
        "status": "affected"
      },
      {
        "version": "17.6.1a",
        "status": "affected"
      },
      {
        "version": "17.6.1x",
        "status": "affected"
      },
      {
        "version": "17.6.3",
        "status": "affected"
      },
      {
        "version": "17.6.1y",
        "status": "affected"
      },
      {
        "version": "17.6.1z",
        "status": "affected"
      },
      {
        "version": "17.6.3a",
        "status": "affected"
      },
      {
        "version": "17.6.4",
        "status": "affected"
      },
      {
        "version": "17.6.1z1",
        "status": "affected"
      },
      {
        "version": "17.6.5",
        "status": "affected"
      },
      {
        "version": "17.6.6",
        "status": "affected"
      },
      {
        "version": "17.7.1",
        "status": "affected"
      },
      {
        "version": "17.7.1a",
        "status": "affected"
      },
      {
        "version": "17.7.1b",
        "status": "affected"
      },
      {
        "version": "17.7.2",
        "status": "affected"
      },
      {
        "version": "17.10.1",
        "status": "affected"
      },
      {
        "version": "17.10.1a",
        "status": "affected"
      },
      {
        "version": "17.10.1b",
        "status": "affected"
      },
      {
        "version": "17.8.1",
        "status": "affected"
      },
      {
        "version": "17.8.1a",
        "status": "affected"
      },
      {
        "version": "17.9.1",
        "status": "affected"
      },
      {
        "version": "17.9.1w",
        "status": "affected"
      },
      {
        "version": "17.9.2",
        "status": "affected"
      },
      {
        "version": "17.9.1a",
        "status": "affected"
      },
      {
        "version": "17.9.1x",
        "status": "affected"
      },
      {
        "version": "17.9.1y",
        "status": "affected"
      },
      {
        "version": "17.9.3",
        "status": "affected"
      },
      {
        "version": "17.9.2a",
        "status": "affected"
      },
      {
        "version": "17.9.1x1",
        "status": "affected"
      },
      {
        "version": "17.9.3a",
        "status": "affected"
      },
      {
        "version": "17.9.4",
        "status": "affected"
      },
      {
        "version": "17.9.1y1",
        "status": "affected"
      },
      {
        "version": "17.11.1",
        "status": "affected"
      },
      {
        "version": "17.11.1a",
        "status": "affected"
      },
      {
        "version": "17.12.1",
        "status": "affected"
      },
      {
        "version": "17.12.1a",
        "status": "affected"
      },
      {
        "version": "17.11.99SW",
        "status": "affected"
      }
    ]
  }
]