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Known exploited vulnerability

CVE-2023-20273

highCVSS 3.1 7.2In CISA KEVEPSS 93%Published · Cisco

The short answer

CVE-2023-20273 affects Cisco Cisco IOS XE Software and is rated high (CVSS 7.2). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-10-23: attackers are using it, so patch it first.

What it is

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands with the privileges of root. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web UI. A successful exploit could allow the attacker to inject commands to the underlying operating system with root privileges.

Weakness: CWE-78.

Severity

7.2 high

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Oct 23, 2023

Federal due date Oct 27, 2023

EPSS, next 30 days

93%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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.

Affected products

Cisco IOS XE Software. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-20273 being exploited?

Yes. CISA added CVE-2023-20273 to its Known Exploited Vulnerabilities catalog on 2023-10-23, with a federal remediation due date of 2023-10-27.

How do I fix CVE-2023-20273?

CISA's required action: 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.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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