Embed Size (px)
DESCRIPTION
ASLR Minix. Wade Gasior. 1. Stack Randomization. STACK. BP. Approach: Randomize GAP size. GAP. DATA. TEXT. / usr / src /servers/pm/ exec.c. Edits to exec.c. 2. Heap Randomization. STACK. BP. Approach: malloc random space (prior to first malloc ). GAP. RANDOM SPACE. DATA. - PowerPoint PPT Presentation
Citation preview
Wade GasiorASLR Minix
1. Stack Randomization
STACK
DATA
TEXT
GAPApproach: Randomize GAP size
BP
Edits to exec.c
/usr/src/servers/pm/exec.c
2. Heap Randomization
STACK
DATA
TEXT
GAP
BP
RANDOM SPACE
Approach: malloc random space(prior to first malloc)
/usr/src/lib/ansi/malloc.c
3. Test: print-adds.c
Test Results
