Bug 1623174 (CVE-2018-15599)

Summary:	CVE-2018-15599 dropbear: User enumeration via malformed packets in authentication requests
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	buytenh, daniellarasouza, i, itamar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:37:02 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1623176, 1623177
Bug Blocks:

Description Laura Pardo 2018-08-28 16:16:53 UTC

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.


References:
http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html

Upstream Patch:
https://secure.ucc.asn.au/hg/dropbear/rev/5d2d1021ca00

Comment 1 Laura Pardo 2018-08-28 16:17:28 UTC

Created dropbear tracking bugs for this issue:

Affects: epel-all [bug 1623177]
Affects: fedora-all [bug 1623176]

Comment 2 Product Security DevOps Team 2019-06-10 10:37:02 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.