CVE-2023-20198
CRITICALCVSS v3
10
CRITICAL
EPSS Score
94.0%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical Details
- Published
- 10/16/2023
- CERT-FR Advisory
- CERTFR-2023-ALE-011
- CERT-FR Link
- CERTFR-2023-ALE-011
Frequently Asked Questions
What is 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. 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.
Is CVE-2023-20198 actively exploited?
Active exploitation of CVE-2023-20198 has not been confirmed. The EPSS score is 94.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-20198?
CVE-2023-20198 has a CVSS v3 base score of 10 (CRITICAL severity).
Is CVE-2023-20198 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.