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.
problem types: Unprotected Alternate Channel
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
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
baseScore: 10
baseSeverity: CRITICAL
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
]
exploits: Cisco is aware of active exploitation of these vulnerabilities.