DoS in Siemens SIPROTEC EN100 Ethernet Module via UDP Port 50000
CVE-2015-5374 is a denial-of-service vulnerability affecting Siemens SIPROTEC devices that use the EN100 Ethernet module, including firmware variants PROFINET IO, Modbus TCP, DNP3 TCP, IEC 104, and the EN100 module included in the SIPROTEC Merging Unit 6MU80. According to the provided content, specially crafted packets sent to UDP port 50000 can cause the affected device to enter an unresponsive state. Affected versions include PROFINET IO firmware for EN100 Ethernet module before V1.04.01, Modbus TCP firmware before V1.11.00, DNP3 TCP firmware before V1.03, IEC 104 firmware before V1.21, and EN100 Ethernet module in SIPROTEC Merging Unit 6MU80 before 1.02.02. The issue is described as being triggerable remotely over the network by malformed or specially crafted UDP traffic directed at the exposed service.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository provides two exploit implementations (Python script and Metasploit module) for CVE-2015-5374, a denial of service vulnerability affecting Siemens SIPROTEC 4 and SIPROTEC Compact EN100 Ethernet Modules with firmware versions below V4.25. The exploit works by sending a specially crafted UDP packet to port 50000 of the target device, causing it to crash and require a manual reboot. The Python script (Siemens_SIPROTEC_DoS.py) is a standalone exploit that takes the target IP as an argument and sends the malicious packet. The Metasploit module (siemens_siprotec4.rb) integrates with the Metasploit Framework, allowing for easier exploitation and automation. Both implementations use the same payload and target the same network vector. The repository is well-structured, with a README.md providing usage instructions, background, and references. No hardcoded IPs or domains are present; the only fingerprintable endpoint is the UDP port 50000 on the target device.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Denial-of-service vulnerability in Siemens SIPROTEC protective relays where specially crafted packets to UDP/50000 can cause device failure, highlighted here in the context of ICS attack impact.
Denial-of-service vulnerability affecting Siemens SIPROTEC protective relays, cited here as used to disable protection relays during the Industroyer attack.
A denial-of-service vulnerability affecting Siemens SIPROTEC digital relays that can render the relay unresponsive, potentially hampering protective relay functionality in electric grid environments.
A denial-of-service vulnerability affecting Siemens SIPROTEC digital relays that can render the relay unresponsive, potentially hampering protective relay functionality in electric grid environments.
The version that knows your environment.
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.