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Anderson Nascimento

@andersonc0d3.bsky.social

Director & Security Researcher @alleleintel.com Blog: https://blog.andersonc0d3.io

476 Posts215 Follower563 Folgt
Allele Security Intelligence@alleleintel.com · last wk.

A qualidade e os benefícios serão os mesmos presentes em todos os nossos serviços: * Conteúdo atualizado com o que há de mais moderno em pesquisa e exploração de vulnerabilidades no kernel do Linux; * Treinamento totalmente prático (hands-on); * Aulas gravadas e disponibilizadas em até 24 horas;

Allele Security Intelligence@alleleintel.com · last wk.

Será mais um mês recheado de conteúdo de alto nível, unindo teoria e muita prática (mão na massa), em que iremos navegar desde o ecossistema até o gerenciamento de memória de um dos maiores softwares já criados.

Allele Security Intelligence@alleleintel.com · last wk.

Após o sucesso do treinamento de exploração de vulnerabilidades em binários, realizado em maio deste ano e no qual obtivemos 100% de satisfação no feedback dos alunos, na próxima semana iniciaremos nosso segundo treinamento do ano: exploração de vulnerabilidades no kernel do Linux.

Bluesky@bsky.app · 4w ago

v1.127 is live! We're rolling out improvements to search over the coming weeks. You'll get more relevant results and more ways to find what you're looking for. The new "Filters" button lets you query and filter by keywords, people, date range, language and more. You can even share your searches!

A rendering of the new "Filters" button and option fields, which allow you to query and filter by keywords, people, date range, language and more.
Anderson Nascimento@andersonc0d3.bsky.social · 4w ago

FreeBSD has added the pdopenpid() system call. It is the FreeBSD equivalent of pidfd_open() on Linux. kern: add pdopenpid(2) github.com/freebsd/free... pdfork.2: document pdopenpid(2) github.com/freebsd/free... sys: add pdopenpid(2) reviews.freebsd.org/D57124

kern: add pdopenpid(2) · freebsd/freebsd-src@5c32aa7

Reviewed by: markj Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D57124

github.com

Anderson Nascimento@andersonc0d3.bsky.social · last mo.

vm.overcommit_memory=2 is always the right setting for servers ariadne.space/2025/12/16/v... vm.max_map_count growing steadily when vm.overcommit_memory is 2 #1328 github.com/jemalloc/jem...

vm.overcommit_memory=2 is always the right setting for servers

The Linux kernel has a feature where you can tune the behavior of memory allocations: the vm.overcommit_memory sysctl. When overcommit is enabled (sadly, this is the default), the kernel will typicall...

ariadne.space

Anderson Nascimento@andersonc0d3.bsky.social · 2mo ago

I wrote this post. As I mention in it, I’ve been using GDB almost daily for about 10 years, but I had never actually looked at its source code. I finally started digging into it to make sense of some quirky behaviors, and I ended up uncovering some fascinating details.

Allele Security Intelligence@alleleintel.com · 2mo ago

We started analyzing a classic case where GDB creates the illusion that code in writable memory is corrupted. We ended up discovering two interesting behaviors of GDB.

Allele Security Intelligence@alleleintel.com · 2mo ago

Did you know there's a way to hit a breakpoint without using hardware or software breakpoints? Or how GDB patches the binary to execute an instruction? Learn more about how GDB works under the hood. Why is my shellcode being corrupted? allelesecurity.com/why-is-my-sh...

Why is my shellcode being corrupted?

Explore the illusion GDB creates in Linux Binary Exploitation, uncovering issues with breakpoints and stack memory behavior in this detailed analysis.

allelesecurity.com