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CVE-2018-15919

5.3 · MEDIUM

Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use.

Published Aug 28, 2018CWE-200EPSS 3.56%

Overview

CVE-2018-15919 is a medium-severity vulnerability. It was published on August 28, 2018 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. NOTE: the discoverer states 'We understand that the OpenSSH developers do not want to treat such a username enumeration (or "oracle") as a vulnerability.'

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/2018/q3/180Refwww.securityfocus.com/bid/105163Refsecurity.netapp.com/advisory/ntap-20181221-0001/Refseclists.org/oss-sec/2018/q3/180Refwww.securityfocus.com/bid/105163Refsecurity.netapp.com/advisory/ntap-20181221-0001/

How CyberStrike helps

Frequently asked questions

What is CVE-2018-15919?

CVE-2018-15919 is a medium-severity vulnerability. It was published on August 28, 2018 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2018-15919?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-15919?

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-2018-15919?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-15919 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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