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CVE-2020-0543 CROSSTALK
CVE ID
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CVE-2020-0543 CROSSTALK
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
Incomplete cleanup from specific special register read operations in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access.
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Ratings
-
Attacker ValueLow
-
ExploitabilityMedium
Technical Analysis
This continues to bury SGX as an actual security mechanism users should be interested in. For leaking keys where you have local access, this is useful for Intel CPUs manufactured in the last 5 years. For general purpose exploitation though, this is less likely to be useful, and the overall risk of using this mechanism still leaves many developers who might use this feature suspicious as they ever were.
The huge performance degradation of RDRAND also isn’t great, though the real problem is for virtual hosting providers where a malicious process or VM can kill overall memory bus performance. https://www.phoronix.com/scan.php?page=news_item&px=RdRand-3-Percent
There are some funny secret-squirrel uses here for the mitigation, as it enables a totally different side-channel problem, but nothing you’d likely see more as a novelty: https://twitter.com/Kryptoblog/status/1270601775184334849
Would you also like to delete your Exploited in the Wild Report?
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General Information
Products
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- fedora 31
- fedora 32
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- simatic field pg m4 firmware
- simatic field pg m5 firmware
- simatic field pg m6 firmware
- simatic ipc3000 smart firmware
- simatic ipc347e firmware
- simatic ipc427d firmware
- simatic ipc427e firmware
- simatic ipc477d firmware
- simatic ipc477e firmware
- simatic ipc477e pro firmware
- simatic ipc527g firmware
- simatic ipc547e firmware
- simatic ipc547g firmware
- simatic ipc627d firmware
- simatic ipc627e firmware
- simatic ipc647d firmware
- simatic ipc647e firmware
- simatic ipc677d firmware
- simatic ipc677e firmware
- simatic ipc827d firmware
- simatic ipc847d firmware
- simatic ipc847e firmware
- simatic itp1000 firmware
- simotion p320 4e firmware
- simotion p320 4s firmware
- threat intelligence exchange server
- threat intelligence exchange server 3.0.0
- ubuntu linux 12.04
- ubuntu linux 14.04
- ubuntu linux 16.04
- ubuntu linux 18.04
- ubuntu linux 19.10
- ubuntu linux 20.04
- xeon e 2124
- xeon e 2124g
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- xeon e 2134
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- xeon e3 1105c
- xeon e3 1105c v2
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- xeon e3 1290 v2
- xeon e3 1501l v6
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- xeon e3 1585l v5
References
Advisory
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Zero-day Exploit
Report as Exploited in the Wild
CVE ID
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