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CVE-2017-1000371

7.8 · HIGH

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIM_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then…

Published Jun 19, 2017EPSS 2.58%

Overview

CVE-2017-1000371 is a high-severity vulnerability. It was published on June 19, 2017 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIM_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary's read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker. This affects Linux Kernel version 4.11.5. This is a different issue than CVE-2017-1000370 and CVE-2017-1000365. This issue appears to be limited to i386 based systems.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.debian.org/security/2017/dsa-3981Refwww.securityfocus.com/bid/99131Refaccess.redhat.com/security/cve/CVE-2017-1000371Refwww.exploit-db.com/exploits/42273/Refwww.exploit-db.com/exploits/42276/Refwww.qualys.com/2017/06/19/stack-clash/stack-clash.txtRefwww.debian.org/security/2017/dsa-3981Refwww.securityfocus.com/bid/99131Refaccess.redhat.com/security/cve/CVE-2017-1000371Refwww.exploit-db.com/exploits/42273/

How CyberStrike helps

Frequently asked questions

What is CVE-2017-1000371?

CVE-2017-1000371 is a high-severity vulnerability. It was published on June 19, 2017 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2017-1000371?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-1000371?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-1000371?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-1000371 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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