CVE-2017-1000253
High KEV — Actively ExploitedLinux 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 3.1 score
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type
CWE-119CVE-2017-1000253 is a Buffer Overflow vulnerability
What is Buffer Overflow?
The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE
References
The following references provide additional information about CVE-2017-1000253 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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Securityfocushttp://www.securityfocus.com/bid/101010Third Party Advisory VDB Entry
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Securitytrackerhttp://www.securitytracker.com/id/1039434Third Party Advisory VDB Entry
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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US Government Resource
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PatchKernel patch commithttps://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt
Frequently asked questions
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What is CVE-2017-1000253?
CVE-2017-1000253 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . CVE-2017-1000253 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild.
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What is the CVSS score for CVE-2017-1000253?
CVE-2017-1000253 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. -
Is there a patch available for CVE-2017-1000253?
No patch is currently available for CVE-2017-1000253. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2017-1000253 actively exploited?
Yes — CVE-2017-1000253 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. It carries a CVSS score of 7.8 (High severity).
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What is Buffer Overflow (CWE-119)?
The product performs operations on a memory buffer but reads or writes outside its intended boundaries. View CWE-119 on MITRE CWE →