National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-15599 Detail

Current 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.

Source:  MITRE
Description Last Modified:  08/20/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.3 MEDIUM
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N (V3 legend)
Impact Score: 1.4
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html Mailing List Third Party Advisory
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00026.html Mailing List Third Party Advisory
https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/ Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Information Leak / Disclosure (CWE-200)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
2018.76


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-15599
NVD Published Date:
08/20/2018
NVD Last Modified:
10/31/2018