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CVE-2016-7917

5.0 · MEDIUM

The nfnetlink_rcv_batch function in net/netfilter/nfnetlink.c in the Linux kernel before 4.5 does not check whether a batch message's length field is large enough, which allows local users to obtai…

Published Nov 16, 2016CWE-125EPSS 1.51%

Overview

CVE-2016-7917 is a medium-severity vulnerability. It was published on November 16, 2016 and has a CVSS 3.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The nfnetlink_rcv_batch function in net/netfilter/nfnetlink.c in the Linux kernel before 4.5 does not check whether a batch message's length field is large enough, which allows local users to obtain sensitive information from kernel memory or cause a denial of service (infinite loop or out-of-bounds read) by leveraging the CAP_NET_ADMIN capability.

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=c58d6c93680f28ac58984af61d0a7ebf4319c241Refsource.android.com/security/bulletin/2016-11-01.htmlRefwww.securityfocus.com/bid/94147GitHubgithub.com/torvalds/linux/commit/c58d6c93680f28ac58984af61d0a7ebf4319c241Refgit.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c58d6c93680f28ac58984af61d0a7ebf4319c241Refsource.android.com/security/bulletin/2016-11-01.htmlRefwww.securityfocus.com/bid/94147GitHubgithub.com/torvalds/linux/commit/c58d6c93680f28ac58984af61d0a7ebf4319c241

How CyberStrike helps

Frequently asked questions

What is CVE-2016-7917?

CVE-2016-7917 is a medium-severity vulnerability. It was published on November 16, 2016 and has a CVSS 3.0 base score of 5.0 (MEDIUM).

How severe is CVE-2016-7917?

This vulnerability has a CVSS 3.0 base score of 5.0, 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-2016-7917?

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-2016-7917?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-7917 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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