CVE-2018-15919: Infoleak
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.'
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is CVE-2018-15919?
CVE-2018-15919 is a vulnerability in OpenSSH that allows remote attackers to detect the existence of users on a target system.
How can this vulnerability be exploited?
This vulnerability can be exploited by remote attackers to remotely observe the behavior of the auth-gss2.c file in OpenSSH.
Which software is affected by CVE-2018-15919?
OpenSSH versions 5.9 to 7.8 are affected by this vulnerability, as well as certain versions of Netapp Cloud Backup, Netapp Data ONTAP Edge, Netapp ONTAP Select Deploy, and Netapp Steelstore.
What is the severity of CVE-2018-15919?
The severity of CVE-2018-15919 is medium with a CVSS score of 5.3.
How can I mitigate this vulnerability?
To mitigate this vulnerability, update OpenSSH to a version that is not affected, or apply the necessary patches provided by the software vendor.