Username enumeration via inconsistent login errors
Published Sep 12, 2023 · Updated Feb 27, 2025
Username enumeration in Siemens IBS QMS Automotive before 12.39 allows local users to identify valid usernames through login attempts. The login handler returns distinguishable errors for nonexistent usernames and valid usernames supplied with incorrect passwords. Access to a local login session is required, and the result is limited to valid account-name disclosure rather than password disclosure or account access.
Summary
What happened
Username enumeration in Siemens IBS QMS Automotive before 12.39 allows local users to identify valid usernames through login attempts. The login handler returns distinguishable errors for nonexistent usernames and valid usernames supplied with incorrect passwords. Access to a local login session is required, and the result is limited to valid account-name disclosure rather than password disclosure or account access.
The record
- CVE
- CVE-2023-40725
- Published
- Sep 12, 2023
- Updated
- Feb 27, 2025
- Vendor
- Siemens
- Product
- IBS QMS Automotive
- Classifications
- CWE-209, T1087
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 12, 2023CVE publishedPublication date reported by the CVE source.
- Feb 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=All versions < V12.39
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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