CVE-2023-20198 - Cisco is providing an update for the ongoing investigation into observed exploitation of the web UI feature in Cisco IOS XE Software

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CRITICAL KEV

Cisco is providing an update for the ongoing investigation into observed exploitation of the web UI feature in Cisco IOS XE Software

Published Oct 16, 2023 ·Due Oct 20, 2023

10.0

CRITICAL

CVSS 3.1

EPSS 99.57%

Description

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 products

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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Cisco

Cisco IOS XE Software

n/a

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

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-420

References (3)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-24377
Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z
MitigationVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20198
government-resourceUS Government Resource

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-24377		Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z		MitigationVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20198		government-resourceUS Government Resource