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CVE-2018-15599

Published: 21 August 2018

The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerability because username validity affects how fields in SSH_MSG_USERAUTH messages are handled, a similar issue to CVE-2018-15473 in an unrelated codebase.

Priority

Low

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
dropbear
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(end of life)
disco Not vulnerable
(2018.76-4)
eoan Not vulnerable
(2018.76-4)
focal Not vulnerable
(2018.76-4)
groovy Not vulnerable
(2018.76-4)
hirsute Not vulnerable
(2018.76-4)
impish Not vulnerable
(2018.76-4)
jammy Not vulnerable
(2018.76-4)
kinetic Not vulnerable
(2018.76-4)
lunar Not vulnerable
(2018.76-4)
mantic Not vulnerable
(2018.76-4)
trusty Does not exist
(trusty was needs-triage)
upstream
Released (2018.76-4)
xenial Needed

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N