CVE-2017-1000253

Linux Kernel PIE Stack Buffer Corruption Vulnerability — Linux / Kernel

Risk tier: Critical — known ransomware use

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.

Scoring

  • CVSS: 7.8 (HIGH, 3.1)
  • EPSS exploitation probability: Not yet available
  • EPSS percentile: Not yet available

CISA KEV status

  • Added to KEV: 2024-09-09
  • Remediation due date: 2024-09-30
  • Known ransomware campaign use: Known

Weakness types (CWE)

  • CWE-119
  • CWE-119

References

More HIGH-severity vulnerabilities · All exploited vulnerabilities