Out-of-Order Execution Side-Channel attack [Spectre/Meltdown]

A flaw in Out-of-Order execution mechanism allows user level programs to leak addresses of kernel and process memory space. This vulnerability can be exploited to bypass KASLR as well as CPU security features like SMAP,SMEP,NX and PXN. It can be exploited to bypass OS process isolation. The issue affects processors from Intel, AMD ,ARM, Samsung and … Continue reading “Out-of-Order Execution Side-Channel attack [Spectre/Meltdown]”

[Zero Day] Memory Leak and Buffer Overflow Vulnerability in GNU C Library Dynamic Loader

Qualys Vulnerability and Malware Research Labs has uncovered vulnerabilities in the Linux operating system specifically in glibc’s ld.so shared object. CVE-2017-1000408 is a Memory Leak vulnerability and CVE-2017-1000409 is a Buffer overflow vulnerability which is not exploitable if /proc/sys/fs/protected_hardlinks is enabled on the machine. The targets are  not vulnerable to either of these vulnerabilities if … Continue reading “[Zero Day] Memory Leak and Buffer Overflow Vulnerability in GNU C Library Dynamic Loader”