Resource exhaustion in Siemens Automation License Manager

CVE-2021-25659

A vulnerability has been identified in Automation License Manager 5 (All versions), Automation License Manager 6 (All versions < V6.0 SP9 Update 2). Sending specially crafted packets to port 4410/tcp of an affected system could lead to extensive memory being consumed and as such could cause a denial-of-service preventing legitimate users from using the system.

Vulnerability class: DoS (Denial of Service)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-25659: held from 0.010 to 0.010.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-25659?
CVE-2021-25659 is a high-severity vulnerability in Siemens Automation License Manager, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-08-10.
How severe is CVE-2021-25659?
High severity. CVSS v3 base score is 7.5 out of 10.