Bug 1293854 (CVE-2014-9512)

Summary:	CVE-2014-9512 rsync: Transferring file outside destination path via just-sent symlink
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:	anemec, cbuissar, luhliari, psimerda, slawomir, ssorce
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rsync 3.1.2	Doc Type:	Bug Fix
Doc Text:	It was discovered that rsync did not properly perform sanity checks on certain meta-information. By sending specially crafted meta-information, a remote attacker could possibly exploit this flaw to cause an rsync endpoint to write data to files outside of the expected destination path.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-02-18 10:51:02 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:	1293856
Bug Blocks:	1295358

Description Adam Mariš 2015-12-23 09:38:47 UTC

A security fix in rsync 3.1.2 was released, adding extra check to the file list to prevent the malicious sender to use unsafe destination path for transferred file, such as just-sent symlink. Affects versions older than 3.1.2.

Upstream patches:

 - Complain if an inc-recursive path is not right for its dir.
https://git.samba.org/rsync.git/?p=rsync.git;a=commit;h=962f8b90045ab331fc04c9e65f80f1a53e68243b

 - Add parent-dir validation for --no-inc-recurse too.
https://git.samba.org/rsync.git/?p=rsync.git;a=commitdiff;h=e12a6c087ca1eecdb8eae5977be239c24f4dd3d9

Additional similar security patches:

 - Receiver now rejects invalid filenames in filelist.
https://git.samba.org/rsync.git/?p=rsync.git;a=commitdiff;h=4cad402ea8a91031f86c53961d78bb7f4f174790

 - Have receiver strip bogus leading slashes on filenames.
https://git.samba.org/rsync.git/?p=rsync.git;a=commitdiff;h=371242e4e8150d4f9cc74cdf2d75d8250535175e

Comment 1 Adam Mariš 2015-12-23 09:39:12 UTC

Created rsync tracking bugs for this issue:

Affects: fedora-all [bug 1293856]

Comment 2 Fedora Update System 2016-01-10 19:23:32 UTC

rsync-3.1.1-8.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-01-22 03:18:55 UTC

rsync-3.1.1-7.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Andrej Nemec 2016-01-22 08:05:53 UTC

Assigned CVE-2014-9512 as reported in https://packetstormsecurity.com/files/135351/USN-2879-1.txt