Bug 1522875 – CVE-2017-17434 rsync: daemon does not check for fnamecmp filenames allowing for access restriction bypass

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 1522875 - (CVE-2017-17434) CVE-2017-17434 rsync: daemon does not check for fnamecmp filenames allowing for access restriction bypass

Summary:	CVE-2017-17434 rsync: daemon does not check for fnamecmp filenames allowing f...

Status:	CLOSED WONTFIX

Aliases:	CVE-2017-17434

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20171204,repor...
Keywords:	Security

Depends On:	1511414
Blocks:	1515738
	Show dependency tree / graph

Reported:	2017-12-06 11:07 EST by Andrej Nemec
Modified:	2018-01-18 06:32 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-12-19 11:29:56 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Andrej Nemec 2017-12-06 11:07:13 EST

The daemon in rsync 3.1.2, and 3.1.3-development before 2017-11-03, does not check for fnamecmp filenames in the daemon_filter_list data structure (in the recv_files function in receiver.c) and also does not apply the sanitize_paths protection mechanism to pathnames found in "xname follows" strings (in the read_ndx_and_attrs function in rsync.c), which allows remote attackers to bypass intended access restrictions.

Upstream patches:

https://git.samba.org/?p=rsync.git;a=commit;h=5509597decdbd7b91994210f700329d8a35e70a1
https://git.samba.org/?p=rsync.git;a=commit;h=70aeb5fddd1b2f8e143276f8d5a085db16c593b9

Comment 1 Andrej Nemec 2017-12-06 11:12:35 EST

Created rsync tracking bugs for this issue:

Affects: fedora-all [bug 1511414]

Comment 2 Raphael Sanchez Prudencio 2017-12-19 11:30:06 EST

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/.

Note You need to log in before you can comment on or make changes to this bug.