CVE-2018-15599 — MEDIUM (5.3)

Q: How severe is CVE-2018-15599?

CVE-2018-15599 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2018-15599?

Check the references section above for vendor advisories and patch information. Affected products include: Debian Debian Linux, Dropbear Ssh Project Dropbear Ssh.

Vulnerability Description

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.

CVSS Score

5.3

MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Debian	Debian Linux	8.0
Dropbear Ssh Project	Dropbear Ssh	<= 2018.76

Related Weaknesses (CWE)

CWE-200

References

http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.htmlMailing ListThird Party Advisory
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00026.htmlMailing ListThird Party Advisory
https://matt.ucc.asn.au/dropbear/CHANGES
https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/eThird Party Advisory
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.htmlMailing ListThird Party Advisory
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00026.htmlMailing ListThird Party Advisory
https://matt.ucc.asn.au/dropbear/CHANGES
https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/eThird Party Advisory

FAQ

What is CVE-2018-15599?

CVE-2018-15599 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...

How severe is CVE-2018-15599?

CVE-2018-15599 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-15599?

Check the references section above for vendor advisories and patch information. Affected products include: Debian Debian Linux, Dropbear Ssh Project Dropbear Ssh.