Implementations of UDP application protocols are susceptible to network loops and denial of service

published 2024-03-19 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-27133

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 5.4%; EPSS 5.4% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

Implementations of UDP application protocol are vulnerable to network loops. An unauthenticated attacker can use maliciously-crafted packets against a vulnerable implementation that can lead to Denial of Service (DOS) and/or abuse of resources.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-2169 updated 2026-11-05 cvss 7.5

udp: Implementations of UDP protocol are vulnerable to network loops

Red Hat Ansible Automation Platform 1.2 rsyslog Red Hat Enterprise Linux 6 ntp, bind, tftp, dnsmasq, ntpdate, rsyslog, +26 more Red Hat Enterprise Linux 7 ntp, bind, sntp, tftp, dnsmasq, ntpdate, +39 more Red Hat Enterprise Linux 8 bind, tftp, dnsmasq, rsyslog, bind-sdb, bind9.16, +42 more Red Hat Enterprise Linux 9 bind, dhcp, tftp, dnsmasq, rsyslog, net-snmp, +36 more Red Hat Enterprise Linux 10 bind, dhcp, tftp, dnsmasq, rsyslog, net-snmp
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-08-02)

Exploit prediction

5.40% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

MikroTik RouterOS-TFTP
Microsoft WDS
dproxy-nexgen dproxy-nexgen
mikrotik routeros_tftp
dproxy-nexgen_project dproxy-nexgen

References

Sources

CVE List CVE-2024-2169
NVD CVE-2024-2169

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary