Buffer overflow in Linux Kernel
CVE-2017-1000253
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.107 (95.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.107 · newest: 0.107 · change: 0.000
Affected products
- Linux Kernel
- Centos — versions 6.0, 6.1, 6.2
- Red Hat Enterprise Linux — versions 6.0, 6.1, 6.2
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2017:2798 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2795 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1039434 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:2801 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2796 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/101010 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:2799 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2794 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2793 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2797 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-1000253?
- CVE-2017-1000253 is a high-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-10-05.
- How severe is CVE-2017-1000253?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-1000253 known to be exploited?
- Yes. CVE-2017-1000253 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-09-09), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.