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
Status
Package | Release | Status |
---|---|---|
dropbear Launchpad, Ubuntu, Debian |
hirsute |
Not vulnerable
(2018.76-4)
|
xenial |
Needed
|
|
jammy |
Not vulnerable
(2018.76-4)
|
|
lunar |
Not vulnerable
(2018.76-4)
|
|
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)
|
|
impish |
Not vulnerable
(2018.76-4)
|
|
kinetic |
Not vulnerable
(2018.76-4)
|
|
trusty |
Does not exist
(trusty was needs-triage)
|
|
upstream |
Released
(2018.76-4)
|
|
mantic |
Not vulnerable
(2018.76-4)
|
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15599
- http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html
- http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html
- https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/
- NVD
- Launchpad
- Debian