I know I’ve talked about memory before, but I haven’t really talked about the library randomization that was added to 10.5. Library randomization is part of ASLR (address space layout randomization) and a good part of the way to moving into full ASLR inclusion, but they haven’t completed that circuit, which a recent TechTarget article mentions: The weakness Dai Zovi exploits is in heap memory, which is memory that’s not in use. To address memory security issues, the PaX project for Linux developed a set of features to protect address space. Two of these are Address Space Layout Randomization (ASLR) and Non-executable memory (NX). ASLR makes it harder for malware…
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Mac OS X Shared Memory
There’s a nice new article explaining shared memory on the 318 TechJournal. Pat on the back to our guys for a great explanation.
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Bakbone: SysCtl and Shared Memory Hax0r to get Bakbone to Play Nice
Shared Memory Tweaking: 1GB Shared memory (set in /etc/sysctl.conf) kern.sysv.shmall: 262144 kern.sysv.shmseg: 32 kern.sysv.shmmni: 128 kern.sysv.shmmin: 1 kern.sysv.shmmax: 1073741824