CVE-2018-15919
Public on 2018-08-28
Modified on 2023-07-03
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.'
The OpenSSH project does not consider CVE-2018-15919 as a security issue and Amazon Linux agrees. No fix is planned for Amazon Linux at this time.
A mitigation is to set 'GSSAPIAuthentication' to 'no' in /etc/ssh/sshd_config if GSSAPI is not needed.
The OpenSSH project does not consider CVE-2018-15919 as a security issue and Amazon Linux agrees. No fix is planned for Amazon Linux at this time.
A mitigation is to set 'GSSAPIAuthentication' to 'no' in /etc/ssh/sshd_config if GSSAPI is not needed.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | openssh | No Fix Planned | ||
| Amazon Linux 2 - Core | openssh | No Fix Planned | ||
| Amazon Linux 2023 | openssh | No Fix Planned |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | CVSSv2 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
| NVD | CVSSv3 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |