CVE-2017-1000253

Basic Information

CVE State

PUBLISHED

Reserved Date

October 03, 2017

Published Date

October 04, 2017

Last Updated

September 10, 2024

Vendor

n/a

Product

n/a

Description

Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the "gap" between the stack and the binary.

CVSS Scores

SSVC Information

Exploitation

active

Technical Impact

total

Exploit Status

Exploited in the Wild

Yes (added 2024-09-09 00:00:00 UTC) Source

Proof of Concept Available

Yes (added 2022-10-16 23:08:16 UTC) Source

Used in Malware

Yes (added 2024-09-09 00:00:00 UTC) Source