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CVE-2017-12192

5.5 · MEDIUM

The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively ins…

Published Oct 12, 2017CWE-476EPSS 0.45%

Overview

CVE-2017-12192 is a medium-severity vulnerability. It was published on October 12, 2017 and has a CVSS 3.0 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.

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

Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678Refwww.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Refaccess.redhat.com/errata/RHSA-2018:0151Refbugzilla.redhat.com/show_bug.cgi?id=1493435GitHubgithub.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678Reflkml.org/lkml/2017/9/18/764Refusn.ubuntu.com/3583-1/Refusn.ubuntu.com/3583-2/Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678Refwww.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5

How CyberStrike helps

Frequently asked questions

What is CVE-2017-12192?

CVE-2017-12192 is a medium-severity vulnerability. It was published on October 12, 2017 and has a CVSS 3.0 base score of 5.5 (MEDIUM).

How severe is CVE-2017-12192?

This vulnerability has a CVSS 3.0 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-12192?

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-2017-12192?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-12192 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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