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    Rewterz Threat Alert – Rhadamanthys Stealer – Active IOCs
    Severity Medium Analysis Summary Rhadamanthys is a type of malware known as a stealer, which is designed to steal sensitive information from infected computers. It was […]
    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – Mirai Botnet aka Katana – Active IOCs
    Severity High Analysis Summary The Mirai botnet is a type of malware that infects Internet of Things (IoT) devices, such as routers, security cameras, and other […]
    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – LockBit Ransomware – Active IOCs
    Severity High Analysis Summary LockBit ransomware takes as little as five minutes to deploy the encryption routine on target systems once it lands on the victim […]

    Threat Insights

    16
    pdf-file (1)
    Annual Threat Intelligence Report 2022
    • Threat Advisories
    • Monthly Threat Insights
    • Threat Intelligence Reports
  • Why Rewterz?

    About Us

    Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.

    Read More

    play_btn_Smallplay_btn_hover_Small
    leadership

    Our Leadership

    Our leadership team brings together years of knowledge and experience in cybersecurity to drive our company's mission and vision. Our team is passionate about delivering high-quality products and services, leading by example and assisting our clients in securing their organization’s environment.
    help

    CSR

    At Rewterz, we believe that businesses have a responsibility to impact positively and contribute to the well-being of our communities as well as the planet. That's why we are committed to operating in a socially responsible and sustainable way.

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November 6, 2018

Rewterz Threat Advisory – Intel CPUs hyper-threading PortSmash Vulnerability

November 5, 2018

Intel CPUs are vulnerable to a timing attack that may steal information decryption keys from other processes running in the same CPU core with SMT/hyper-threading enabled.

 

 

IMPACT:  CRITICAL

 

 

PUBLISH DATE:  05-11-2018

 

 

OVERVIEW

 

 

This is a flaw in the Intel processor execution engine sharing on SMT (e.g. Hyper-Threading) architectures. It can result in leakage of secret data in applications such as OpenSSL that has secret dependent control flow at any granularity level. Utilizing this attack, researchers were able to steal the private decryption key from an OpenSSL thread running in the same core as their exploit.

 

 

ANALYSIS

 

 

In Intel processors, an attacker can sniff out sensitive protected data, like passwords and cryptographic keys, from other processes running in the same CPU core with simultaneous multi-threading (SMT) feature enabled.

 

It’s a side-channel vulnerability residing in Intel’s Hyper-Threading technology, the company’s implementation of Simultaneous MultiThreading (SMT). This performance feature works by splitting up each physical core of a processor into virtual cores, known as threads, allowing multiple computing threads to be executed at the same time.

 

The problem is, since SMT runs two threads in two independent processes alongside each other in the same physical core to boost performance, it is highly possible for one process to detect with much accuracy what the other is doing.

 

Therefore, if an attacker succeeds in running a malicious PortSmash process alongside a selected victim process on the same CPU core, the PortSmash code will be able to snoop on the operations performed by the other process by precisely measuring the time taken for each operation.

 

 

AFFECTED PRODUCTS

 

 

The PortSmash timing attack is confirmed to work on Intel’s Kaby Lake and Skylake processors currently, while other SMT architectures including AMD’s are highly suspected to be vulnerable with some modifications to their code.

 

 

MITIGATION

 

 

The recommended mitigation technique for the PortSmash vulnerability is to disable SMT/Hyper-Threading in the CPU chip’s BIOS until Intel releases security patches. OpenSSL users can upgrade to OpenSSL 1.1.1 (or >= 1.1.0i).

 

 

If you think you’re the victim of a cyber-attack, immediately send an email to soc@rewterz.com for a quick response.

Platform

  • Rewterz XDR
  • Rewterz Defense
  • Rewterz Threat Intelligence

Managed Security Services

  • Managed Security Monitoring
  • Remote SOC
  • Onsite SOC
  • Hybrid SOC

Assess

  • Compromise Assessment
  • APT Assessment
  • Penetration Testing
  • Architecture Design & Review
  • Red Team Assessment
  • Purple Team Assessment
  • Social Engineering
  • Source Code Review

Transform

  • SOC Consultancy
  • SOC Maturity Assessment
  • SOC Model Evaluation
  • SOC Gap Analysis
  • SIEM Gap Analysis
  • SIEM Optimization
  • SOC Content Pack

Train

  • Simulated Cyber Attack Exercise
  • Tabletop Exercise
  • Security Awareness and Training

Respond

  • Incident Analysis
  • Incident Response

Threat Insights

  • Threat Advisories
  • Monthly Threat Insights
  • Threat Intelligence Reports

Resources

  • Blog
  • Press Releases

Connect With Us

  • Contact
  • Careers
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