Covert channels through branch predictors

Author: udtr

August undefined, 2024

Webexﬁltration of unintended secrets through observing speculative PHT updates (in the form of covert and side channels). We further investigate the PHT collision mechanism in the history-based predictor and the branch prediction mode transitions in Intel processors. WebCovert channels through shared processor resources provide secret communication between two malicious processes: the trojan and the spy. In this article, we classify, analyze, and compare covert ch...

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WebSep 30, 2024 · This leaves attackers with the opportunities to perform side-channel attacks on the branch predictor. This paper focuses on the saturating counter to explore a secure and lightweight design to mitigate branch predictor side-channel attacks. ... Abu-Ghazaleh N. Understanding and mitigating covert channels through branch predictors. ACM ... WebIn this paper, we introduce a new mechanism for covert communication using the processor branch pre-diction unit. Specifically, we demonstrate how a trojan and a spy can manipulate the branch prediction tables in a way that creates high-capacity, robust and … most reliable 12 gauge pump shotgun

‪Dmitry Ponomarev‬ - ‪Google Scholar‬

WebSep 13, 2024 · Side channel attacks through branch prediction units [4, 5, 36] have been shown as well. Similarly to caches where hits (data is found in the cache) or misses (data is not in the cache) cause different timing, branch predictions or mis-predictions give different timing. ... Understanding and mitigating covert channels through branch predictors ... Web[CCS-16] Covert Channels through Random Number Generator: Mechanisms, Capacity Estimation and Mitigations Dmitry Evtyushkin, Dmitry Ponomarev. 23rdACM Conference on Computer and Communications Security, Vienna, Austria, October 2016. Acceptance … most reliable 17 inch laptops

Securing Workloads Against Side Channel Methods - Intel

BranchSpec: Information Leakage Attacks Exploiting …

WebWe construct two covert channel attacks: (1) A Prime+Probe covert channel attack using the shared LLC (Section III); and (2) a contention based covert channel using contention on the shared bus to reach the LLC (Section IV). For each attack, we had to solve a number of unique challenges that arise due to the asymmetric nature of the channels (e ... WebIn this paper, we present a covert channel through branch predictor that is based on two observations. The state of a branch predictor is shared by all processes executing on the same core. minimalist monitor backgroundWebIn this paper, we introduce a new mechanism for covert communication using the processor branch prediction unit. Specifically, we demonstrate how a trojan and a spy can manipulate the branch prediction tables in a way that creates high-capacity, robust and … minimalist modern living room furniture

"WebCovert channels can tunnel through secure operating systems and require special measures to control. Covert channel analysis is the only proven way to control covert channels. [citation needed] By contrast, secure operating systems can easily prevent … " - Covert channels through branch predictors

Covert channels through branch predictors

Understanding and Mitigating Covert Channels Through …

WebFeb 8, 2024 · Configuring Workloads for Microarchitectural and Side Channel Security. Incidental channels in computing systems are unintended communication channels formed by valid properties such as execution time, power consumption, and the use of shared resources. When data flows through an incidental channel, both data values and … WebJun 13, 2015 · We evaluate the prediction accuracy of four branch predictor configurations: 1) a totally shared predictor, 2) a completely …

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WebOct 27, 2024 · Notably, BranchSpectre side channels can take advantage of much simpler code patterns than those used in Spectre attacks. We present an extensive BranchSpectre code gadget analysis on a set of popular real-world application code bases followed by a … WebJul 20, 2024 · We also estimate the capacity of the branch predictor covert channels and describe a software-only mitigation technique that is based on randomizing the state of the predictor tables on context ...

WebJump over ASLR: Attacking branch predictors to bypass ASLR. D Evtyushkin, D Ponomarev, N Abu-Ghazaleh ... Understanding and mitigating covert channels through branch predictors. D Evtyushkin, D Ponomarev, N Abu-Ghazaleh. ACM Transactions on Architecture and Code Optimization (TACO) 13 (1), 1-23, 2016. 72: 2016: WebNov 22, 2024 · Covert channels have been an effective means for leaking confidential information across security domains and numerous studies are available on typical cov An Efficient Approach for Mitigating Covert Storage Channel Attacks in Virtual Machines by …

WebFirst, we present local covert channels based on Optane’s internal caching. Second, we demonstrate a keystroke side-channel attack on a remote user via Intel’s Optane-optimized key-value store, pmemkv. Third, we study a fully remote covert channel through pmemkv. Fourth, we present our Note Board attack, also through pmemkv, enabling two ... WebIn this exercise, you will implement and experiment with covert channel communications using branch predictors. In computer security, a covert channel is a type of security and surveillance evading technique that enables data transfer and digital communications between processes that are not allowed to communicate according to security or access …

Weba covert channel that communicates secrets through intentionally perturbing the branch pattern history structure via speculative branch executions. Our evaluation on Intel Skylake- and Coffee Lake-based processors reveals that these information leakage attacks are highly accurate and successful. To the best of our

Webobservable by an unprivileged attacker through a covert channel. Unfortunately, while new attack variants are continuously being discovered, we do not have a systematic way to characterize ... v1.2, v2) leverage the mis-training of the branch predictors, Intel, AMD and ARM have proposed defenses to prevent mis-training, e.g., Indirect Branch ... minimalist modern shower curtainsWebIn this article, we classify, analyze, and comprehensively compare covert channels through processor branch predictor unit. This covert channel is possible because the branch predictor is shared by multiple applications running on the same CPU. Further-more, the contents of the branch predictor tables are not ﬂushed on context switches. minimalist modern house interiorWebexﬁltration of unintended secrets through observing speculative PHT updates (in the form of covert and side channels). We further investigate the PHT collision mechanism in the history-based predictor and the branch prediction mode transitions in Intel processors. minimalist mom dawn lifeWebCovert channels through shared processor resources provide secret communication between two malicious processes: the trojan and the spy. In this article, we classify, analyze, and compare covert channels through dynamic branch prediction units in modern … minimalist modern track lightingWebBranch Prediction Unit Properties that make covert channel possible: During execution branch predictor accumulates state BP is shared among all processes on core BP is not flushed on context switches Parallel threads in SMT share same BP Branch … minimalist modern window treatmentsWebSep 30, 2024 · This leaves attackers with the opportunities to perform side-channel attacks on the branch predictor. This paper focuses on the saturating counter to explore a secure and lightweight design to mitigate branch predictor side-channel attacks. ... Abu … minimalist modern wooden coffee tableWebBranch Prediction. On the Power of Simple Branch Prediction Analysis; Predicting Secret Keys Via Branch Prediction; Jump Over ASLR: Attacking Branch Predictors to Bypass ASLR; BranchScope: A New Side-Channel Attack on Directional Branch Predictor; Understanding and Mitigating Covert Channels Through Branch Predictors; TSX most reliable 1tb flash drive