Bug 1511411 (CVE-2017-16548)

Summary:	CVE-2017-16548 rsync: Heap-based buffer over-read in receive_xattr function
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	code, hobbes1069, luhliari, mruprich, ssorce, yozone
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:	2017-11-14 11:16:31 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:	1511412, 1511413, 1511414
Bug Blocks:	1511417

Description Adam Mariš 2017-11-09 10:11:34 UTC

The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0' character in an xattr name, which allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) or possibly have unspecified other impact by sending crafted data to the daemon.

Upstream bug:

https://bugzilla.samba.org/show_bug.cgi?id=13112

Upstream patch:

https://git.samba.org/rsync.git/?p=rsync.git;a=commit;h=47a63d90e71d3e19e0e96052bb8c6b9cb140ecc1

Comment 1 Adam Mariš 2017-11-09 10:12:02 UTC

Created rsync tracking bugs for this issue:

Affects: fedora-all [bug 1511414]


Created rsync-bpc tracking bugs for this issue:

Affects: epel-7 [bug 1511413]
Affects: fedora-all [bug 1511412]

Comment 2 Stefan Cornelius 2017-11-14 11:16:42 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.