CVE-2017-1000253

 

Published at: - 05-10-2017 03:29

Last modified: - 17-01-2023 10:04

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt
• 1039434-Third Party Advisory, VDB Entry
• 101010-Third Party Advisory, VDB Entry
• RHSA-2017:2802-Third Party Advisory
• RHSA-2017:2801-Third Party Advisory
• RHSA-2017:2800-Third Party Advisory
• RHSA-2017:2799-Third Party Advisory
• RHSA-2017:2798-Third Party Advisory
• RHSA-2017:2797-Third Party Advisory
• RHSA-2017:2796-Third Party Advisory
• RHSA-2017:2795-Third Party Advisory
• RHSA-2017:2794-Third Party Advisory
• RHSA-2017:2793-Third Party Advisory

 

Keywords

NVD

 

CVE-2017-1000253

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures