In my previous post, I provided an extensive analysis of the memory allocator used by the GNU C library. In this post, I’ll show how weaknesses in the glibc heap allocator design can be abused to turn memory errors like buffer overflows (spatial defects) or use-after-free bugs (temporal errors)
This post discusses memory defects at the stack level, covering different stack exploitation techniques and how they are mitigated in modern environments. If you are interested in heap exploitation, see my other post, which introduces heap-based attacks and explains how memory allocators can be abused to achieve successful heap exploitation.
Memory defects such as buffer overflows, double frees, and use-after-free remain a leading cause of security vulnerabilities in low-level programming languages like C and C++. Contemporary heap exploits differ significantly from stack-based attacks. Exploiting heap defects requires more than just triggering a bug, it demands a deep understanding of the
While diving into BPF internals, I discovered certain types of attacks that can be used to mess with the internals of security solutions relying on BPF for prevention and detection. Specifically, an attacker could silently disable the delivery and execution of BPF programs, by stealing a file descriptor and completely
Last week, a vulnerability in Apache Parquet’s Java library CVE-2025-30065 was published, carrying a CVSS score of 10.0. Parquet is widely used in modern data pipelines and analytics systems, including technologies like Apache Spark, Trino, Iceberg, etc. As a result, a malicious actor who is able to deliver
During the last few months, I spent a significant amount of time reviewing system modeling literature and exploring the current advancements in this area of research. Specifically, my goal was to apply advanced machine learning including deep learning techniques to efficiently represent system events in a euclidean space and detect
Writing performant, portable, and correct parallel programs in multiprocessor systems or SMP, where each processor may load and store to a single shared address space, is not trivial. Programmers must be aware of the underlying memory semantics, i.e. the system optimizations performed by the clever beast hardware or cpu.
Spring announced on October 25, 2024, CVE-2024-38821, a critical vulnerability allowing attackers to access restricted resources under certain circumstances. The vulnerability specifically impacts Spring WebFlux's static resource serving. For it to affect an application, all of the following must be true: It must be a WebFlux application. It
Last week, I saw this post (https://www.theregister.com/2024/07/12/cisa_broke_into_fed_agency/) discussing the exploitation of an unpatched Oracle vulnerability. The unnamed federal agency took over two weeks to apply the available patch 😜. When I read the post, I was like: Is RASP or
