CVE-2018-15919 : Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existenc

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.'

Published 2018-08-28 08:29:00

Updated 2019-03-07 16:29:32

Source MITRE

View at NVD, CVE.org

Vulnerability category: Information leak

Threat overview for CVE-2018-15919

Top countries where our scanners detected CVE-2018-15919

Top open port discovered on systems with this issue 22

IPs affected by CVE-2018-15919 20,276,424

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2018-15919!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2018-15919

Probability of exploitation activity in the next 30 days: 0.26%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 65 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2018-15919

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.3	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: Low Integrity: None Availability: None

CWE ids for CVE-2018-15919

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-15919

http://www.securityfocus.com/bid/105163

OpenSSH CVE-2018-15919 User Enumeration Vulnerability
Third Party Advisory;VDB Entry
https://security.netapp.com/advisory/ntap-20181221-0001/

CVE-2018-15919 OpenSSH Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
http://seclists.org/oss-sec/2018/q3/180

oss-sec: Another OpenSSH "user enumeration"
Mailing List;Patch;Third Party Advisory

Products affected by CVE-2018-15919