Multiple buffer overflows in Siemens Automation License Manager (ALM) 4.0 through 5.1+SP1+Upd1 allow remote attackers to execute arbitrary…

published 2012-01-08 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4455

cvss: 7.5; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 6.9%; EPSS 6.9% chance of exploitation in 30 days, percentile 94%
public exploits: 1; Exploit-DB

Multiple buffer overflows in Siemens Automation License Manager (ALM) 4.0 through 5.1+SP1+Upd1 allow remote attackers to execute arbitrary code via a long serialid field in an _licensekey command, as demonstrated by the (1) check_licensekey or (2) read_licensekey command.

Vendor advisories

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

cisa ICSA-11-361-01 updated 2025-06-09 cvss 7.5

Siemens Automation License Manager Vulnerabilities

Siemens Automation License Manager >=4.0, <5.1+SP1+Upd1, >=2.0, <5.1+SP1+Upd2
affected: mitigation “Customers of vulnerable versions of Siemens ALM should deploy the Siemens patch that Siemens sent out to its customers.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

2011-11-28 First public exploit (EDB-18165)
2012-01-08 Published

Exploit prediction

6.86% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

EDB-18165 siemens automation license manager 500.0.122.1 - Multiple Vulnerabilities dos, 2011-11-28
aluigi.altervista.org http://aluigi.altervista.org/adv/almsrvx_1-adv.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

aluigi.altervista.org /adv/almsrvx_1-adv.txt
exploit
support.automation.siemens.com /WW/llisapi.dll/57252401?func=ll&objId=57252401&objAction=csView&nodeid0=17323948&lang=en&siteid=cseus&aktprim
vendor-advisory
support.automation.siemens.com /WW/view/en/114358
us-cert.gov /control_systems/pdf/ICSA-11-361-01.pdf
us-government-resource

Sources

CVE List CVE-2011-4529
NVD CVE-2011-4529

Fencer Intel 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