Cryptographic secret disclosure via frequency throttling
Published Jun 15, 2022 · Updated May 5, 2025
Information disclosure in Intel Processors allows remote authenticated users to extract cryptographic secrets through response timing. Data-dependent power consumption triggers dynamic frequency throttling, converting processor power differences into measurable wall-clock timing variations. Exploitation requires repeated access to a secret-bearing computation and tailored inputs that amplify the timing signal; demonstrated attacks extracted SIKE keys without local power measurements.
Summary
What happened
Information disclosure in Intel Processors allows remote authenticated users to extract cryptographic secrets through response timing. Data-dependent power consumption triggers dynamic frequency throttling, converting processor power differences into measurable wall-clock timing variations. Exploitation requires repeated access to a secret-bearing computation and tailored inputs that amplify the timing signal; demonstrated attacks extracted SIKE keys without local power measurements.
The record
- CVE
- CVE-2022-24436
- Published
- Jun 15, 2022
- Updated
- May 5, 2025
- Vendor
- Topcon Positioning Systems, Inc.
- Product
- Intel Processors
- Classifications
- CWE-203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 15, 2022CVE publishedPublication date reported by the CVE source.
- May 5, 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?
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- Affected versionversion=See references
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.
Weakness, pattern, technique
Public exploit references
- Hertzbleed experiment and SIKE attack codeproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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