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A Stack Use-After-Free Vulnerability Hiding in Linux for 15 Years

GhostLock

Based on NebuSec Research

2024

02

The Discovery

Uncovering a critical vulnerability that went unnoticed for over a decade

What is GhostLock?

  • 01
    Stack Use-After-Free (UAF) A memory corruption vulnerability where freed stack memory is accessed
  • 02
    Universal Presence Existed in ALL Linux distributions for 15 years
  • 03
    Stealthy Persistence Remained completely undetected across countless security audits
  • 04
    Core System Impact Affects fundamental Linux kernel components

15 Years in the Shadows

2009
Vulnerability Introduced

The UAF bug enters the Linux codebase

2010-2023
Silent Presence

Exists across all major distributions undetected

2024
Discovery

NebuSec researchers identify and disclose GhostLock

2024
Patched

Fix deployed across Linux distributions

05

The Impact

Understanding why this discovery matters for the security community

15 Years
Duration of vulnerability in production systems
Affecting every major Linux distribution worldwide

Why GhostLock Matters

public

Universal Reach

Every Linux distribution was vulnerable, affecting millions of systems

schedule

Extended Exposure

15 years provided ample time for potential exploitation

security

Audit Blindness

Evaded numerous security audits and code reviews

code

Kernel-Level Risk

Stack UAF vulnerabilities can lead to privilege escalation

Thank You

Security research keeps our systems safe. Stay informed, stay secure.

Source: nebusec.ai/research/ionstack-part-2 | Hacker News: 258 points
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