CVE-2017-1000253

Linux Kernel PIE Stack Buffer Corruption Vulnerability

7.8 HIGHActively exploited (CISA KEV)Used in ransomwareEPSS 10.7%

Published4 Oct 2017
Added to CISA KEV9 Sept 2024
Remediation due30 Sept 2024

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 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Centos6.0 · 6.1 · 6.2 · 6.3

Linux Kernel≥ 2.6.25 < 3.2.70 · ≥ 3.11 < 3.12.43 · ≥ 3.13 < 3.14.41 · ≥ 3.15 < 3.16.35

Redhat Enterprise Linux6.0 · 6.1 · 6.2 · 6.3

Remediation

Fixed in

Linux Kernel≥ 3.2.70

Patch & vendor advisories

https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt

References

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

and 4 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2017-1000253 being actively exploited?

Yes. CVE-2017-1000253 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 9 Sept 2024. It has been used in ransomware campaigns.

How severe is CVE-2017-1000253?

CVE-2017-1000253 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 10.7% probability of exploitation.

Which products are affected by CVE-2017-1000253?

Affected products include Centos, Linux Kernel, Redhat Enterprise Linux.

How do I fix CVE-2017-1000253?

Upgrade affected software to a fixed version, for example Linux Kernel 3.2.70 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-1000253 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.