CVE-2018-15919 — Vulnetix

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% · 84.3th percentile

Risk Scores

EPSS Score

2.08%

84.3th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:18.04:LTS	openssh-ssh1	1:7.5p1-10, 1:7.5p1-9build1, 1:7.5p1-9
Ubuntu:20.04:LTS	openssh-ssh1	0, 1:7.5p1-11build1
Ubuntu:Pro:18.04:LTS	openssh	1:7.6p1-4ubuntu0.7+esm4, *, 0
Ubuntu:Pro:16.04:LTS	openssh	0, ,
Ubuntu:Pro:14.04:LTS	openssh	1:6.6p1-2ubuntu2.13+esm2, 1:6.5p1-1, 1:6.5p1-2
Ubuntu:20.04:LTS	openssh	, , 1:8.2p1-4ubuntu0.13

Exploit Intelligence

CIRCL seen: CVE-2018-15919 (circl-sighting)
CIRCL published-proof-of-concept: CVE-2018-15919 (circl-sighting)
CIRCL published-proof-of-concept: CVE-2018-15919 (circl-sighting)
CIRCL seen: CVE-2018-15919 (circl-sighting)
CIRCL seen: CVE-2018-15919 (circl-sighting)
CIRCL seen: CVE-2018-15919 (circl-sighting)
CIRCL seen: CVE-2018-15919 (circl-sighting)
CIRCL seen: CVE-2018-15919 (circl-sighting)
https://security.netapp.com/advisory/ntap-20181221-0001/ (circl)
105163 (circl)

…and 1 more exploits

Timeline

Aug 28, 2018 CVE Published
Aug 30, 2018 PoC Published
Apr 14, 2021 EPSS Score
Feb 4, 2022 EPSS Score
Mar 7, 2023 EPSS Score
Jul 1, 2024 PoC Published
Jul 1, 2024 PoC Published
Jul 1, 2024 PoC Published
Feb 1, 2025 PoC Published
Mar 17, 2025 EPSS Score
Mar 29, 2025 EPSS Score
Mar 30, 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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