CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
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.
Recent assessments:
Assessed Attacker Value: 0
Assessed Attacker Value: 0Assessed Attacker Value: 0
www.securityfocus.com/bid/101010
www.securitytracker.com/id/1039434
access.redhat.com/errata/RHSA-2017:2793
access.redhat.com/errata/RHSA-2017:2794
access.redhat.com/errata/RHSA-2017:2795
access.redhat.com/errata/RHSA-2017:2796
access.redhat.com/errata/RHSA-2017:2797
access.redhat.com/errata/RHSA-2017:2798
access.redhat.com/errata/RHSA-2017:2799
access.redhat.com/errata/RHSA-2017:2800
access.redhat.com/errata/RHSA-2017:2801
access.redhat.com/errata/RHSA-2017:2802
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000253
www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low