Welcome to BFS Labs
Here you will be presented with the latest and most exciting security research activities undertaken by the Blue Frost Security research team. You will find whitepapers, tools, advisories and blog posts.
Advisories
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Microsoft Hyper-V: Multiple Vulnerabilities in vmswitch.sys
Multiple bugs are present in WPP code when handling set OID requests, one of them allowing to dereference (read access) an attacker controlled pointer, and the rest causing out of bounds read accesses
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Microsoft Hyper-V Type Confusion leading to Arbitrary Memory Dereference
A bug present in the Hyper-V (hvix64) hash-table implementation allows to dereference memory near (or belonging to) the hash-table struct object.
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Microsoft Hyper-V NULL Pointer Dereference Denial of Service
A bug present in Hyper-V's (hvix64) emulation handler for VMLAUNCH/VMRESUME allows a malicious L2 hypervisor to trigger a NULL pointer dereference in the L1 hypervisor.
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Microsoft Hyper-V Stack Overflow Denial of Service
A bug present in the hvix64 module (hypervisor) causes infinite recursion, leading to a stack overflow.
Publications
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A bug collision tale
The inside story of our CVE-2019-2025 exploit
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TEE Exploitation
Exploiting Trusted Apps on Samsung’s TEE
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Abusing GDI for Ring0 Exploit Primitives: Evolution
Windows 10 kernel exploitation techniques based on the latest Windows 10 RS3 insider preview
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Look Mom! I Don’t Use Shellcode
A Browser Exploitation Case Study for Internet Explorer 11
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Exploiting CVE-2014-4113 on Windows 8.1
Analysis of the Windows kernel vulnerability CVE-2014-4113, demonstrating how it can successfully be exploited on Windows 8.1.
Blog
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Revisiting CVE-2017-11176
In this post we are deviating a bit from the typical format of posts on our blog and try to provide some introductory material into Android/Linux kernel exploitation.
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BFS Ekoparty 2022 Exploitation Challenges
Show us your skills, to get a free invite to the BFS VIP dinner/party as well as an opportunity to join our team!
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Windows Segment Heap: Attacking the VS Allocator
Abusing the Windows segment heap metadata to turn a heap overflow into an overlapping chunk allocation
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BFS Hiring Challenge
Show us your skills, and get an opportunity to join BFS!
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Meltdown Reloaded: Breaking Windows KASLR by Leaking KVA Shadow Mappings
This blogpost explains how Meltdown can still be used to leak some specific kernel data and break Windows KASLR in the latest Windows versions, including "Windows 10" 20H1, despite the KVA Shadow mechanism introduced to mitigate Meltdown.