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CVE-2023-20198
Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
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.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.
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Cisco IOS XE Web UI Privilege Escalation Vulnerability
10/16/2023
10/20/2023
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.
CVE Modified by Cisco Systems, Inc.1/25/2024 12:15:34 PM
Action
Type
Old Value
New Value
Added
CWE
Cisco Systems, Inc. CWE-420
Removed
Reference
Cisco Systems, Inc. http://packetstormsecurity.com/files/175674/Cisco-IOX-XE-Unauthenticated-Remote-Code-Execution.html
Reanalysis by NIST11/15/2023 2:29:03 PM
Action
Type
Old Value
New Value
Changed
Reference Type
http://packetstormsecurity.com/files/175674/Cisco-IOX-XE-Unauthenticated-Remote-Code-Execution.html Exploit, Third Party Advisory
http://packetstormsecurity.com/files/175674/Cisco-IOX-XE-Unauthenticated-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
Modified Analysis by NIST11/15/2023 2:08:46 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (excluding) 17.9.4a
OR
*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions from (including) 16.12 up to (excluding) 16.12.10a
*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions from (including) 17.3 up to (excluding) 17.3.8a
*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions from (including) 17.6 up to (excluding) 17.6.6a
*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions from (including) 17.9 up to (excluding) 17.9.4a
Changed
Reference Type
http://packetstormsecurity.com/files/175674/Cisco-IOX-XE-Unauthenticated-Remote-Code-Execution.html No Types Assigned
http://packetstormsecurity.com/files/175674/Cisco-IOX-XE-Unauthenticated-Remote-Code-Execution.html Exploit, Third Party Advisory
CVE Modified by Cisco Systems, Inc.11/13/2023 10:15:08 PM
Action
Type
Old Value
New Value
Added
Reference
Cisco Systems, Inc. http://packetstormsecurity.com/files/175674/Cisco-IOX-XE-Unauthenticated-Remote-Code-Execution.html [No types assigned]
CVE Modified by Cisco Systems, Inc.11/07/2023 2:15:08 PM
Cisco is aware of active exploitation of a previously unknown vulnerability in the web UI feature of Cisco IOS XE Software when exposed to the internet or to untrusted networks. This vulnerability allows a remote, unauthenticated attacker to create an account on an affected system with privilege level 15 access. The attacker can then use that account to gain control of the affected system.
For steps to close the attack vector for this vulnerability, see the Recommendations section of this adv
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 a
Removed
Reference
Cisco Systems, Inc. https://arstechnica.com/security/2023/10/actively-exploited-cisco-0-day-with-maximum-10-severity-gives-full-network-control/
Removed
Reference
Cisco Systems, Inc. https://www.cisa.gov/guidance-addressing-cisco-ios-xe-web-ui-vulnerabilities
Removed
Reference
Cisco Systems, Inc. https://www.darkreading.com/vulnerabilities-threats/critical-unpatched-cisco-zero-day-bug-active-exploit
CVE Modified by Cisco Systems, Inc.10/25/2023 2:17:22 PM
OR
*cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (excluding) 17.9.4a
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Added
CWE
NIST NVD-CWE-noinfo
Changed
Reference Type
https://arstechnica.com/security/2023/10/actively-exploited-cisco-0-day-with-maximum-10-severity-gives-full-network-control/ No Types Assigned
https://arstechnica.com/security/2023/10/actively-exploited-cisco-0-day-with-maximum-10-severity-gives-full-network-control/ Press/Media Coverage, Third Party Advisory
Changed
Reference Type
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z No Types Assigned
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