{"id":"CVE-2024-20304","title":"Cisco IOS XR Software Packet Memory Exhaustion Vulnerability","summary":"A vulnerability in the multicast traceroute version 2 (Mtrace2) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust the UDP packet memory of an affected device.\r\n\r\nThis vulnerability exists because t…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","cvssSource":"vendor","vendor":"Cisco","product":"Cisco IOS XR Software","affected":["ios_xr_software"],"published":"2024-09-11","updated":"2024-09-11","sourceUpdated":"2024-09-11T16:00:00+00:00","source":"CSAF","sourceUrl":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-pak-mem-exhst-3ke9FeFy","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-pak-mem-exhst-3ke9FeFy"},{"url":"https://software.cisco.com"}],"tags":["csaf","vendor-advisory","cisco"],"epss":0.00596,"epssPercentile":0.4658,"ingestedAt":"2026-10-03T07:59:32.845Z","slug":"CVE-2024-20304","body":"## Overview\n\nA vulnerability in the multicast traceroute version 2 (Mtrace2) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust the UDP packet memory of an affected device.\r\n\r\nThis vulnerability exists because the Mtrace2 code does not properly handle packet memory. An attacker could exploit this vulnerability by sending crafted packets to an affected device. A successful exploit could allow the attacker to exhaust the incoming UDP packet memory. The affected device would not be able to process higher-level UDP-based protocols packets, possibly causing a denial of service (DoS) condition.\r\n\r\nNote: This vulnerability can be exploited using IPv4 or IPv6.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis 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 [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75416\"].\n\n## Vendor advisories\n\n- **cisco-sa-pak-mem-exhst-3ke9FeFy** · Cisco · affected: Cisco IOS XR Software · updated 2024-09-11 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-pak-mem-exhst-3ke9FeFy)\n\n**Cisco IOS XR Software UDP Packet Memory Exhaustion Vulnerability**. Released 2024-09-11.\n\nAffected:\n\n- Cisco IOS XR Software\n\n## Remediation\n\nCisco has released software updates that address this vulnerability. https://software.cisco.com","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}