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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: hobbes1069, luhliari, mruprich, pavlix, ssorce, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20171031,reported=20171106,source=cve,cvss3=6.5/CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H,cwe=CWE-170,rhel-5/rsync=wontfix,rhel-6/rsync=wontfix,rhel-7/rsync=wontfix,fedora-all/rsync=affected,fedora-all/rsync-bpc=affected,epel-7/rsync-bpc=affected
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: ---
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/.