Arbitrary code execution via ash arithmetic overflow
Published Aug 22, 2023 · Updated Jul 14, 2026
Stack overflow in BusyBox ash on affected Siemens devices allows local users to execute arbitrary code through crafted shell input. The ash_arith path passes attacker-controlled arithmetic text to evaluate_string, which writes eight bytes beyond a dynamic stack buffer. Execution requires local access and user interaction; successful exploitation can compromise device confidentiality, integrity, and availability.
Summary
What happened
Stack overflow in BusyBox ash on affected Siemens devices allows local users to execute arbitrary code through crafted shell input. The ash_arith path passes attacker-controlled arithmetic text to evaluate_string, which writes eight bytes beyond a dynamic stack buffer. Execution requires local access and user interaction; successful exploitation can compromise device confidentiality, integrity, and availability.
The record
- CVE
- CVE-2022-48174
- Published
- Aug 22, 2023
- Updated
- Jul 14, 2026
- Vendor
- Siemens
- Product
- SCALANCE XRM334 (24 V DC, 12xFO)
- Classifications
- CWE-787, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 22, 2023CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record 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=0 <V3.3
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.
Public exploit references
- BusyBox bug 15216 proof inputproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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