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CVE-2020-10136 is an unauthenticated vulnerability in certain implementations of IP Encapsulation within IP as defined by RFC 2003. Affected devices improperly validate encapsulated IP-in-IP packets before decapsulation and routing, including incomplete inspection of the inner IP packet carried within the outer packet. When a device accepts IP-in-IP traffic from arbitrary sources to arbitrary destinations without explicit tunnel configuration or equivalent validation, an attacker can send specially crafted packets that cause the device to decapsulate and forward traffic unexpectedly. This behavior can turn the device into a forwarding or reflection point, enabling spoofing, access-control bypass, information leakage, and reflected denial-of-service activity.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a scanner and attack suite targeting routers (primarily Cisco) vulnerable to unauthenticated IP-in-IP and GRE packet forwarding (CVE-2020-10136, CVE-2024-7595). The structure includes a Rust-based scanner (scanner/src/main.rs) for identifying vulnerable hosts and a set of Python tools (abuse_honeypot.py, can_i_spoof.py, dns_reflect.py) for exploiting these vulnerabilities. The scanner sends crafted packets to detect hosts that forward encapsulated traffic, while the Python tools enable practical exploitation: verifying spoofing capability, abusing honeypots to generate false abuse reports, and launching DNS reflection/amplification DDoS attacks. The exploit leverages the ability to send spoofed packets from the vulnerable host, bypassing source address validation. The repository is operational, with working code and clear instructions, and is not part of a larger exploit framework.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
IP-in-IP -protokollan toteutuksiin liittyvä datankäsittely-/tarkastusvirhe, jossa kapseloidun sisemmän IP-paketin tarkastus tehdään vajavaisesti. Tämä mahdollistaa haitallisen tai muuten estettävän liikenteen kuljettamisen laitteen läpi, mikä voi johtaa mm. DDoS-välitykseen (reflektio/proxy) ja verkon suodatus-/rajoitusmekanismien ohitukseen sekä tiedonkeruuseen (esim. SNMP) kohteesta haavoittuvan laitteen kautta.
An IP-in-IP packet processing vulnerability affecting multiple vendors' products, including HP printers, Digi mobile routers, Treck TCP/IP stack implementations, and Cisco Nexus/UCS products. The issue can lead to denial of service and potentially network access.
An unauthenticated IP-in-IP packet processing vulnerability that can allow traffic forwarding through exposed interfaces, enabling reflected DDoS, information leakage, and bypass of network access controls.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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.