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high7.8Known exploitedPublic exploit code

CVE-2017-1000253

Linux Kernel PIE Stack Buffer Corruption Vulnerability

Exploited in the wild

This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2024-09-09. Federal due date: 2024-09-30.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

Impact

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.

Affected products

VendorProductAffected versions
CentosCentos
Versions 6.0, 6.1, 6.2, 6.3, 6.4, 6.5
RedhatEnterprise Linux
Versions 6.0, 6.1, 6.2, 6.3, 6.4, 6.5
LinuxLinux Kernel
from 2.6.25 before 3.2.70
from 3.3 before 3.4.109
from 3.5 before 3.10.77
from 3.11 before 3.12.43
from 3.13 before 3.14.41
from 3.15 before 3.16.35

Weakness classification

CWE-119

References