The stack randomization feature in the Linux kernel before 3.19.1 on 64-bit platforms uses incorrect data types for the results of bitwise left-shift operations, which makes it easier for attackers to bypass the ASLR protection mechanism by predicting the address of the top of the stack, related to the randomize_stack_top function in fs/binfmt_elf.c and the stack_maxrandom_size function in arch/x86/mm/mmap.c.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1593
Reference (s):
- BID:72607
- URL: http://www.securityfocus.com/bid/72607
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4e7c22d447bb6d7e37bfe39ff658486ae78e8d77
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.1
- https://bugzilla.redhat.com/show_bug.cgi?id=1192519