Code execution via unchecked WebSocket JSON copy
Published May 9, 2024 · Updated Feb 13, 2025
Stack buffer overflow in Nuki Smart Lock and Bridge firmware allows remote attackers to execute arbitrary code via SSE WebSocket JSON. The ws_parse_response function copies attacker-controlled id and other JSON values into a 1,024-byte stack buffer with sprintf without checking their lengths. Exploitation requires control of device-bound WebSocket traffic, such as a man-in-the-middle position enabled by the separate TLS-validation flaw, and grants control of the device.
Summary
What happened
Stack buffer overflow in Nuki Smart Lock and Bridge firmware allows remote attackers to execute arbitrary code via SSE WebSocket JSON. The ws_parse_response function copies attacker-controlled id and other JSON values into a 1,024-byte stack buffer with sprintf without checking their lengths. Exploitation requires control of device-bound WebSocket traffic, such as a man-in-the-middle position enabled by the separate TLS-validation flaw, and grants control of the device.
The record
- CVE
- CVE-2022-32504
- Published
- May 9, 2024
- Updated
- Feb 13, 2025
- Vendor
- Nuki Home Solutions
- Product
- Nuki Bridge
- Classifications
- CWE-120, T1203
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 9, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 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=1.22.0* <1.22.0
- Affected versionversion=2.13.2* <2.13.2
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
- NCC Group WebSocket JSON overflow demonstrationproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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