CVE-2024-20304

highpriority · track · 30EPSS 0.006 · 48 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.60% (48th) EPSS

CVSS 7.5 · high

Is it mine?

54 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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. This 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. Note: This vulnerability can be exploited using IPv4 or IPv6.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco IOS XR Softwarecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–8.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.9 · impact 4

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · NCSC-NL NL

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-401USprimaryCWE-401USCWE-401US

affected products (54)

Products and version ranges known to be affected.

Cisco IOS XR <24.1.1all versionscert_bundDE
Cisco IOS XR <24.1.2all versionscert_bundDE
Cisco IOS XR <24.2.2all versionscert_bundDE
Cisco IOS XR <7.10.2all versionscert_bundDE
Cisco IOS XR <7.11.1all versionscert_bundDE
Cisco IOS XR <7.11.2all versionscert_bundDE
Cisco IOS XR <7.11.21all versionscert_bundDE
Cisco IOS XR< 24.1.1cert_bundDE
Cisco IOS XR< 24.1.2cert_bundDE
Cisco IOS XR< 24.2.2cert_bundDE
Cisco IOS XR< 7.10.2cert_bundDE
Cisco IOS XR< 7.11.1cert_bundDE
Cisco IOS XR< 7.11.2cert_bundDE
Cisco IOS XR< 7.11.21cert_bundDE
Cisco Cisco IOS XR Softwareall versionscisco_csafUS
Cisco Cisco IOS XR Software≤ 24.1.1enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.7.1enisa_euvdEU
Cisco Cisco IOS XR Software≤ 24.2.11enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.8.1enisa_euvdEU
Cisco Cisco IOS XR Software≤ 7.11.2enisa_euvdEU

showing 20 of 54

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2024-0371Kwetsbaarheden verholpen in Cisco IOS XRNL2024-09-13csaf · ncsc_nlNL
Cisco heeft kwetsbaarheden verholpen in IOS XR.
WID-SEC-W-2024-2125Cisco IOS XR: Mehrere SchwachstellenDeutsch2024-09-11csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Cisco IOS XR ausnutzen, um einen Denial of Service Angriff durchzuführen, erhöhte Rechte zu erlangen und vertrauliche Informationen preiszugeben.
cisco-sa-pak-mem-exhst-3ke9FeFyCisco IOS XR Software UDP Packet Memory Exhaustion Vulnerability2024-09-11csaf · cisco_csafUS
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. This 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. Note: This vulnerability can be exploited using IPv4 or IPv6. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. 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 ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75416"].

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisco_csaf ncsc_nl NVD CVE.org MITRE

published 2024-09-11modified 2026-06-17

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references (5)

External citations — patches, advisories, analysis.

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