Unauthenticated device crash via malformed HTTP URI
Published Apr 12, 2022 · Updated Aug 3, 2024
A buffer overflow in Siemens SCALANCE X-300 switch firmware before 4.1.4 allows remote attackers to crash devices with crafted HTTP GET URIs. The embedded web server fails to validate URI length before copying request data into a bounded buffer, permitting memory corruption during GET handling. No authentication or user interaction is required; successful exploitation crashes the affected switch and interrupts its availability.
Summary
What happened
A buffer overflow in Siemens SCALANCE X-300 switch firmware before 4.1.4 allows remote attackers to crash devices with crafted HTTP GET URIs. The embedded web server fails to validate URI length before copying request data into a bounded buffer, permitting memory corruption during GET handling. No authentication or user interaction is required; successful exploitation crashes the affected switch and interrupts its availability.
The record
- CVE
- CVE-2022-26335
- Published
- Apr 12, 2022
- Updated
- Aug 3, 2024
- Vendor
- Siemens
- Product
- SCALANCE X307-2 EEC (2x 230V)
- Classifications
- CWE-120, T0814
- Attack vector
- network
- 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?
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- Affected versionversion=All versions < V4.1.4
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
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