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Cisco IOS XR Software Dedicated XML Agent TCP Denial of Service Vulnerability

cisco-sa-iosxr-xml-tcpdos-ZEXvrU2S · Medium · Published · Updated

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-xml-tcpdos-ZEXvrU2S This advisory is part of the September 2024 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication.

Workarounds

There are no workarounds that address this vulnerability. However, if the Dedicated XML Agent feature is not needed and is disabled in the configuration, the device is not affected.

While this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

CVEsCVE-2024-20390
Cisco Bug IDsCSCwj39201
CVSS ScoreBase 5.3
Base 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:X
Product Names From Source
Cisco IOS XR Software, Cisco IOS

CSAF Product Statuses

Product Status Source CVE Rows
Cisco IOS XR Software known_affected cisco_csaf CVE-2024-20390 1

Related Products

Product CVE Evidence
Cisco IOS XR Software CVE-2024-20390 Cisco OpenVuln
Cisco IOS CVE-2024-20390 Cisco OpenVuln
Cisco IOS Software CVE-2024-20390 Cisco OpenVuln