Unauthenticated device crash via malformed HTTP headers
Published Apr 12, 2022 · Updated Aug 3, 2024
Improper HTTP-header validation in Siemens SCALANCE X-300 firmware before 4.1.4 allows remote attackers to crash affected switches. The embedded web server accepts malformed HTTP headers without adequate validation and reaches a fault that terminates device operation. No authentication is required, but the vendor rates access as adjacent-network; successful exploitation interrupts industrial switching until recovery.
Summary
What happened
Improper HTTP-header validation in Siemens SCALANCE X-300 firmware before 4.1.4 allows remote attackers to crash affected switches. The embedded web server accepts malformed HTTP headers without adequate validation and reaches a fault that terminates device operation. No authentication is required, but the vendor rates access as adjacent-network; successful exploitation interrupts industrial switching until recovery.
The record
- CVE
- CVE-2022-25751
- Published
- Apr 12, 2022
- Updated
- Aug 3, 2024
- Vendor
- Siemens
- Product
- SCALANCE X307-2 EEC (2x 230V)
- Classifications
- CWE-20, T0814
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 12, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record 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 < V4.1.4
What conditions does exploitation require?
What is affected?
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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