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CVE-2013-5211 is an NTP monlist amplification vulnerability in ntpd versions before 4.2.7p26. The legacy monlist functionality processes unauthenticated REQ_MON_GETLIST and REQ_MON_GETLIST_1 requests and returns disproportionate responses. An attacker can forge request source addresses to cause vulnerable NTP servers to reflect amplified traffic toward a victim, enabling distributed denial-of-service attacks.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (13 hidden).
This repository contains a proof-of-concept (PoC) exploit for CVE-2013-5211, the NTP 'monlist' reflection vulnerability. The main exploit code is in 'ntpdos.cpp', a C++ program that constructs and sends spoofed UDP packets to NTP servers, causing them to send amplified responses to a victim IP address. The tool supports specifying single or multiple targets and NTP servers via command-line arguments or files. The Makefile is used for building and installing the binary, and a bash completion script is provided for ease of use. The exploit is not part of a framework and is a standalone PoC. Its primary purpose is to demonstrate and facilitate a distributed NTP reflection DoS attack by abusing misconfigured NTP servers. No hardcoded endpoints are present; all targets and servers are user-supplied at runtime. The repository is structured with clear separation of code, documentation, and build scripts.
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8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An NTP monlist information disclosure and amplification vulnerability that can be abused for DDoS and reconnaissance by exposing recent client IP addresses from vulnerable or misconfigured NTP servers.
An NTP-related vulnerability associated with amplification attacks and used as a DRDoS vector.
A network-accessible NTP monlist amplification vulnerability in ntpd versions before 4.2.7p26. Attackers can forge monlist requests to generate amplified reflected traffic for denial-of-service attacks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.