Load value injection
 Logo for the Load Value Injection security vulnerability | |
| CVE identifier(s) | CVE-2020-0551 |
|---|---|
| Date discovered | March 2020 |
| Affected hardware | Intel x86 microprocessors |
| Website | lviattack |
Load value injection (LVI) is an attack on Intel microprocessors that can be used to attack Intel's Software Guard Extensions (SGX) technology.[1] It is a development of the previously known Meltdown security vulnerability. Unlike Meltdown, which can only read hidden data, LVI can inject data values, and is resistant to the countermeasures so far used to mitigate the Meltdown vulnerability.[2][3]
In theory, any processor affected by Meltdown may be vulnerable to LVI,[4] but (As of March 2020), LVI is only known to affect Intel microprocessors.[2] Intel has published a guide to mitigating the vulnerability by using compiler technology, requiring existing software to be recompiled to add LFENCE memory barrier instructions at every potentially vulnerable point in the code.[5] However, this mitigation appears likely to result in substantial performance reductions in the recompiled code.[6]
See also
References
- ↑ "Load Value Injection". 2020-03-10. https://software.intel.com/security-software-guidance/software-guidance/load-value-injection.
- ↑ 2.0 2.1 Cimpanu, Catalin. "Intel CPUs vulnerable to new LVI attacks" (in en). https://www.zdnet.com/article/intel-cpus-vulnerable-to-new-lvi-attacks/.
- ↑ Alcorn, Paul (10 March 2020). "New Load Value Injection Vulnerability Found In Intel Chips" (in en). https://www.tomshardware.com/uk/news/load-value-injection-vulnerability-found-in-intel-chips.
- ↑ Claburn, Thomas (10 Mar 2020). "Meltdown The Sequel strikes Intel chips – and full mitigation against data-meddling LVI flaw will slash performance" (in en). https://www.theregister.co.uk/2020/03/10/lvi_intel_cpu_attack/.
- ↑ "An Optimized Mitigation Approach for Load Value Injection". https://software.intel.com/security-software-guidance/insights/optimized-mitigation-approach-load-value-injection.
- ↑ Cutress, Ian. "Load Value Injection: A New Intel Attack Bypasses SGX with Significant Performance Mitigation Concerns". https://www.anandtech.com/show/15608/load-value-injection-a-new-intel-attack-bypasses-sgx-with-significant-performance-mitigation-concerns.
External links
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