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Known exploited vulnerability

CVE-2024-20399

mediumCVSS 3.1 6.7In CISA KEVEPSS 4.3%Published · Cisco

The short answer

CVE-2024-20399 affects Cisco Cisco NX-OS Software and is rated medium (CVSS 6.7). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-07-02: attackers are using it, so patch it first.

What it is

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated user in possession of Administrator credentials to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of arguments that are passed to specific configuration CLI commands. An attacker could exploit this vulnerability by including crafted input as the argument of an affected configuration CLI command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with the privileges of root. Note: To successfully exploit this vulnerability on a Cisco NX-OS device, an attacker must have Administrator credentials. The following Cisco devices already allow administrative users to access the underlying operating system through the bash-shell feature, so, for these devices, this vulnerability does not grant any additional privileges: Nexus 3000 Series Switches Nexus 7000 Series Switches that are running Cisco NX-OS Software releases 8.1(1) and later Nexus 9000 Series Switches in standalone NX-OS mode

Weakness: CWE-78.

Severity

6.7 medium

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

Exploited (CISA KEV)

Yes, since Jul 2, 2024

Federal due date Jul 23, 2024

EPSS, next 30 days

4.3%

Higher than 91% of scored CVEs

How it can be exploited

Attack vector
Local
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

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected products

Cisco NX-OS Software, nx-os. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2024-20399 being exploited?

Yes. CISA added CVE-2024-20399 to its Known Exploited Vulnerabilities catalog on 2024-07-02, with a federal remediation due date of 2024-07-23.

How do I fix CVE-2024-20399?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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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