CVE-2018-15919

MEDIUM

OpenSSH 5.9-7.8 - User Enumeration via GSS2 Authentication

Title source: llm

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.'

References (3)

Core 3

Core References

Third Party Advisory x_refsource_confirm

https://security.netapp.com/advisory/ntap-20181221-0001/

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

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

Mailing List, Patch, Third Party Advisory x_refsource_misc

http://seclists.org/oss-sec/2018/q3/180

Scores

CVSS v3 5.3

EPSS 0.0207

EPSS Percentile 84.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-200

Status published

Products (6)

netapp/cloud_backup

netapp/cn1610_firmware

netapp/data_ontap_edge

netapp/ontap_select_deploy

netapp/steelstore

openbsd/openssh 5.9 - 7.8

Published Aug 28, 2018

Tracked Since Feb 18, 2026