Bug 1629973 (CVE-2018-16743)

Summary:	CVE-2018-16743 mgetty: Stack-based buffer overflow with long username in contrib/next-login/login.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abhgupta, dbaker, jokerman, msekleta, sthangav, trankin, zdohnal
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:	2018-10-10 13:48:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1629974
Bug Blocks:	1629987

Description Pedro Sampaio 2018-09-17 17:34:11 UTC

An issue was discovered in mgetty before 1.2.1. In contrib/next-login/login.c, the command-line parameter username is passed unsanitized to strcpy(), which can cause a stack-based buffer overflow.

References:

https://www.x41-dsec.de/lab/advisories/x41-2018-007-mgetty

Comment 1 Pedro Sampaio 2018-09-17 17:34:39 UTC

Created mgetty tracking bugs for this issue:

Affects: fedora-all [bug 1629974]

Comment 2 Riccardo Schirone 2018-09-19 13:18:42 UTC

Statement:

This issue did not affect the versions of mgetty as shipped with Red Hat Enterprise Linux 5, 6 and 7 as they did not include the patched login binary provided by mgetty.