CVE-2018-15919 — Vulnetix

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CVE-2018-15919 PUBLISHED

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.'

EPSS 2.08% · 83.9th percentile

Risk Scores

EPSS Score

2.08%

83.9th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:18.04:LTS	openssh-ssh1	1:7.5p1-9build1, 1:7.5p1-9, 0
Ubuntu:20.04:LTS	openssh-ssh1	0, 1:7.5p1-11build1
Ubuntu:Pro:18.04:LTS	openssh	1:7.6p1-4ubuntu0.5, 1:7.6p1-4ubuntu0.3, 1:7.6p1-4ubuntu0.2
Ubuntu:Pro:16.04:LTS	openssh	1:7.2p2-4ubuntu2.7, 0, 1:6.9p1-2
Ubuntu:Pro:14.04:LTS	openssh	1:6.6p1-2ubuntu2.4, 1:6.6p1-2ubuntu2, 1:6.6p1-2ubuntu2.11
Ubuntu:20.04:LTS	openssh	1:8.2p1-4ubuntu0.11, 1:8.2p1-4ubuntu0.12, 1:8.2p1-4ubuntu0.13

Timeline

Aug 28, 2018 CVE Published
Apr 14, 2021 EPSS Score
Feb 4, 2022 EPSS Score
Mar 7, 2023 EPSS Score
Mar 17, 2025 EPSS Score
Mar 29, 2025 EPSS Score
Mar 30, 2025 EPSS Score
May 1, 2025 EPSS Score
May 4, 2025 EPSS Score
Jun 1, 2025 EPSS Score
Jun 4, 2025 EPSS Score
Jul 1, 2025 EPSS Score

References

https://ubuntu.com/security/CVE-2018-15919 third-party-advisory
http://www.openwall.com/lists/oss-security/2018/08/27/2 third-party-advisory
http://seclists.org/oss-sec/2018/q3/180 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2018-15919 third-party-advisory

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