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.
Reserved 2022-10-27 | Published 2023-10-16 | Updated 2024-10-23 | Assigner
ciscoCRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA Known Exploited Vulnerability
Date added 2023-10-16 | Due date 2023-10-20
Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.
Problem types
Unprotected Alternate Channel
Product status
16.1.1
affected
16.1.2
affected
16.1.3
affected
16.2.1
affected
16.2.2
affected
16.3.1
affected
16.3.2
affected
16.3.3
affected
16.3.1a
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
16.3.10
affected
16.3.11
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
16.6.2
affected
16.6.3
affected
16.6.4
affected
16.6.5
affected
16.6.4a
affected
16.6.5a
affected
16.6.6
affected
16.6.7
affected
16.6.8
affected
16.6.9
affected
16.6.10
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
16.8.1s
affected
16.8.1c
affected
16.8.1d
affected
16.8.2
affected
16.8.1e
affected
16.8.3
affected
16.9.1
affected
16.9.2
affected
16.9.1a
affected
16.9.1b
affected
16.9.1s
affected
16.9.3
affected
16.9.4
affected
16.9.3a
affected
16.9.5
affected
16.9.5f
affected
16.9.6
affected
16.9.7
affected
16.9.8
affected
16.10.1
affected
16.10.1a
affected
16.10.1b
affected
16.10.1s
affected
16.10.1c
affected
16.10.1e
affected
16.10.1d
affected
16.10.2
affected
16.10.1f
affected
16.10.1g
affected
16.10.3
affected
16.11.1
affected
16.11.1a
affected
16.11.1b
affected
16.11.2
affected
16.11.1s
affected
16.12.1
affected
16.12.1s
affected
16.12.1a
affected
16.12.1c
affected
16.12.1w
affected
16.12.2
affected
16.12.1y
affected
16.12.2a
affected
16.12.3
affected
16.12.8
affected
16.12.2s
affected
16.12.1x
affected
16.12.1t
affected
16.12.4
affected
16.12.3s
affected
16.12.3a
affected
16.12.4a
affected
16.12.5
affected
16.12.6
affected
16.12.1z1
affected
16.12.5a
affected
16.12.5b
affected
16.12.1z2
affected
16.12.6a
affected
16.12.7
affected
16.12.9
affected
16.12.10
affected
17.1.1
affected
17.1.1a
affected
17.1.1s
affected
17.1.1t
affected
17.1.3
affected
17.2.1
affected
17.2.1r
affected
17.2.1a
affected
17.2.1v
affected
17.2.2
affected
17.2.3
affected
17.3.1
affected
17.3.2
affected
17.3.3
affected
17.3.1a
affected
17.3.1w
affected
17.3.2a
affected
17.3.1x
affected
17.3.1z
affected
17.3.4
affected
17.3.5
affected
17.3.4a
affected
17.3.6
affected
17.3.4b
affected
17.3.4c
affected
17.3.5a
affected
17.3.5b
affected
17.3.7
affected
17.3.8
affected
17.4.1
affected
17.4.2
affected
17.4.1a
affected
17.4.1b
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
17.6.2
affected
17.6.1w
affected
17.6.1a
affected
17.6.1x
affected
17.6.3
affected
17.6.1y
affected
17.6.1z
affected
17.6.3a
affected
17.6.4
affected
17.6.1z1
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
17.10.1
affected
17.10.1a
affected
17.10.1b
affected
17.8.1
affected
17.8.1a
affected
17.9.1
affected
17.9.1w
affected
17.9.2
affected
17.9.1a
affected
17.9.1x
affected
17.9.1y
affected
17.9.3
affected
17.9.2a
affected
17.9.1x1
affected
17.9.3a
affected
17.9.4
affected
17.9.1y1
affected
17.11.1
affected
17.11.1a
affected
17.12.1
affected
17.12.1a
affected
17.11.99SW
affected
References
sec.cloudapps.cisco.com/...o-sa-iosxe-webui-privesc-j22SaA4z (cisco-sa-iosxe-webui-privesc-j22SaA4z)
cve.org (CVE-2023-20198)
nvd.nist.gov (CVE-2023-20198)
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