Bug 1828580 (CVE-2020-8694)
| Summary: | CVE-2020-8694 kernel: Insufficient access control vulnerability in PowerCap Framework | ||
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| Product: | [Other] Security Response | Reporter: | Pedro Sampaio <psampaio> |
| Component: | vulnerability | Assignee: | Nobody <nobody> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | acaringi, adscvr, airlied, bhu, blc, bmasney, dvlasenk, esyr, hdegoede, hkrzesin, itamar, jarodwilson, jeremy, jforbes, jlelli, jonathan, josef, jpoimboe, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mjg59, mlangsdo, nmurray, pmatouse, ppandit, ptalbert, qzhao, rt-maint, rvrbovsk, steved, walters, williams, wmealing |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
A flaw was found in the Linux kernel's implementation of Intel's Running Average Power Limit (RAPL) implementation. A local attacker could infer secrets by measuring power usage and also infer private data by observing the power usage of calculations performed on the data.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1844297, 1844298, 1844299, 1844300, 1896525, 1957867, 1957868 | ||
| Bug Blocks: | 1828581 | ||
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Description
Pedro Sampaio
2020-04-27 20:34:41 UTC
Mitigation: A temporary measure would be to remove the ability for non-root users to read the current RAPL energy reporting metrics. This can be done with the command: $ sudo chmod 400 /sys/class/powercap/intel_rapl/*/energy_uj This mitigation will only work on the current boot and will need to be reapplied at each system boot to remain in effect. Acknowledgments: Name: Intel Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1896525] |