52 lines
1.4 KiB
Markdown
52 lines
1.4 KiB
Markdown
OCTOPUS
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---
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Samuel AUBERTIN - EURECOM - 2022
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**OCTOPUS** is a [Spectre v2](https://spectreattack.com/spectre.pdf) (_Branch Target Injection_) compiler flag tester for [CVE 2017-5715](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715).
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It measures the success rate of the same attack using different compilers:
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- GCC
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- CLANG
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And compilation/linking flags such as:
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- Optimisation levels (```-O```)
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- Static linking
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- RETPOLINE
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## Dependencies
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- ```clang``` and ```lld```
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- ```gcc```
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- ```sftp```
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- ```uuid```
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- The libC static symbols ```glibc-static```
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## Execution
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```make```
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## Results aggregation
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Results are automatically uploaded to a server with ```sftp``` using a dedicated account.
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Here is an exhaustive list of the data sent:
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- CPU model name and microcode version.
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- Kernel version and compilation date.
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- The kernel compilation flag ```CONFIG_RETPOLINE```.
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- GCC and clang versions.
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- The list of mitigations enabled at runtime.
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- The cache timings of the processor computed by the ```calibrate_threshold()``` function.
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- Each spectre execution success rate.
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**NONE** of this data will be used for anyhting else except this experiment.
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## Sources
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- [ErikAugust gist](https://gist.github.com/ErikAugust/724d4a969fb2c6ae1bbd7b2a9e3d4bb6)
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- [genua GmbH PoC](https://github.com/genua/meltdown)
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