Description
Siemens Automation License Manager (ALM) 4.0 through 5.1+SP1+Upd1 does not properly copy fields obtained from clients, which allows remote attackers to cause a denial of service (exception and daemon crash) via long fields, as demonstrated by fields to the (1) open_session->workstation->NAME or (2) grant->VERSION function.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- siemens automation license manager 500.0.122.1 - Multiple Vulnerabilities EDB-18165 · dos · Nov 28, 2011 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- ICSA-11-361-01 Siemens Automation License Manager Vulnerabilities CISA ICS & IT advisories · Jun 9, 2025
References
- http://support.automation.siemens.com/WW/view/en/114358
- http://aluigi.altervista.org/adv/almsrvx_1-adv.txt
- http://support.automation.siemens.com/WW/llisapi.dll/57252401?func=ll&objId=57252401&objAction=csView&nodeid0=17323948&lang=en&siteid=cseus&aktprim=0&extranet=standard&viewreg=WW&load=content
- http://www.us-cert.gov/control_systems/pdf/ICSA-11-361-01.pdf