Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Centos | Centos | 6.0 |
| Redhat | Enterprise Linux | 6.0 |
| Linux | Linux Kernel | >= 2.6.25, < 3.2.70 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/101010Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039434Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2793Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2794Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2795Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2796Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2797Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2798Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2799Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2800Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2801Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2802Third Party Advisory
- https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txtPatchThird Party Advisory
- http://www.securityfocus.com/bid/101010Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039434Third Party AdvisoryVDB Entry
FAQ
What is CVE-2017-1000253?
CVE-2017-1000253 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 wa...
How severe is CVE-2017-1000253?
CVE-2017-1000253 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-1000253?
Check the references section above for vendor advisories and patch information. Affected products include: Centos Centos, Redhat Enterprise Linux, Linux Linux Kernel.