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CVE-2017-1000253 Details

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NameCVE-2017-1000253
StatusCandidate
DescriptionLinux 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.
ReferencesBID:101010
URL: http://www.securityfocus.com/bid/101010
MISC: https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt
REDHAT:RHSA-2017:2793
URL: https://access.redhat.com/errata/RHSA-2017:2793
REDHAT:RHSA-2017:2794
URL: https://access.redhat.com/errata/RHSA-2017:2794
REDHAT:RHSA-2017:2795
URL: https://access.redhat.com/errata/RHSA-2017:2795
REDHAT:RHSA-2017:2796
URL: https://access.redhat.com/errata/RHSA-2017:2796
REDHAT:RHSA-2017:2797
URL: https://access.redhat.com/errata/RHSA-2017:2797
REDHAT:RHSA-2017:2798
URL: https://access.redhat.com/errata/RHSA-2017:2798
REDHAT:RHSA-2017:2799
URL: https://access.redhat.com/errata/RHSA-2017:2799
REDHAT:RHSA-2017:2800
URL: https://access.redhat.com/errata/RHSA-2017:2800
REDHAT:RHSA-2017:2801
URL: https://access.redhat.com/errata/RHSA-2017:2801
REDHAT:RHSA-2017:2802
URL: https://access.redhat.com/errata/RHSA-2017:2802
SECTRACK:1039434
URL: http://www.securitytracker.com/id/1039434
PhaseAssigned (20171003)
VotesNone (candidate not yet proposed)
Comments


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