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CVE-2017-7558

5.1 · MEDIUM

A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13.

Published Jul 26, 2018CWE-125EPSS 3.62%

Overview

CVE-2017-7558 is a medium-severity vulnerability. It was published on July 26, 2018 and has a CVSS 3.0 base score of 5.1 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.

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

Refseclists.org/oss-sec/2017/q3/338Refwww.securityfocus.com/bid/100466Refwww.securitytracker.com/id/1039221Refaccess.redhat.com/errata/RHSA-2017:2918Refaccess.redhat.com/errata/RHSA-2017:2930Refaccess.redhat.com/errata/RHSA-2017:2931Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7558Refmarc.info/?l=linux-netdev&m=150348777122761&w=2Refwww.debian.org/security/2017/dsa-3981Refseclists.org/oss-sec/2017/q3/338

How CyberStrike helps

Frequently asked questions

What is CVE-2017-7558?

CVE-2017-7558 is a medium-severity vulnerability. It was published on July 26, 2018 and has a CVSS 3.0 base score of 5.1 (MEDIUM).

How severe is CVE-2017-7558?

This vulnerability has a CVSS 3.0 base score of 5.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-7558?

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-2017-7558?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-7558 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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