Is CVE-2024-20390 in the CISA KEV catalog?

No. CVE-2024-20390 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-20390?

CVE-2024-20390 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2024-20390?

CVE-2024-20390 has an EPSS score of 0.44% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-20390?

Upgrade ios xr to 24.1.2 or later.

CVE & CISA-KEV Catalog

CVE-2024-20390

MEDIUM

5.3

CVSS v3

NVD

Description

A vulnerability in the Dedicated XML Agent feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) on XML TCP listen port 38751. This vulnerability is due to a lack of proper error validation of ingress XML packets. An attacker could exploit this vulnerability by sending a sustained, crafted stream of XML traffic to a targeted device. A successful exploit could allow the attacker to cause XML TCP port 38751 to become unreachable while the attack traffic persists.

CWE-940

How to fix

Remediation Available

ios xrNVD

Affected:< 24.1.2Fixed in:24.1.2CVE-2024-20390derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.44%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Vendor Advisory1

sec.cloudapps.cisco.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-10-07.