Bug 1536661 – CVE-2018-5764 rsync: sanitization bypass in parse_argument in options.c

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Bug 1536661 - (CVE-2018-5764) CVE-2018-5764 rsync: sanitization bypass in parse_argument in options.c

Summary:	CVE-2018-5764 rsync: sanitization bypass in parse_argument in options.c

Status:	CLOSED WONTFIX

Aliases:	CVE-2018-5764

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=20180117,repor...
Keywords:	Security

Depends On:	1540312 1536662
Blocks:	1536665
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Reported:	2018-01-19 15:57 EST by Laura Pardo
Modified:	2018-09-19 20:28 EDT (History)
CC List:	10 users (show)

See Also:
Fixed In Version:	rsync 3.1.3
Doc Type:	If docs needed, set a value
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Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-01-30 13:38:13 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Laura Pardo 2018-01-19 15:57:42 EST

A flaw was found in rsync verions before 3.1.3. The parse_argument function in options.c in rsyncd component does not prevent multiple --protect-args uses. Thus letting the user to specify the arg in the protected-arg list and shortcut some of the arg-sanitizing code. This vulnerability allows remote attackers to bypass the argument-sanitization protection mechanism, which may lead to a privilege escalation vulnerability.


References:
https://download.samba.org/pub/rsync/src-previews/rsync-3.1.3pre1-NEWS

Patch:
https://git.samba.org/rsync.git/?p=rsync.git;a=commit;h=7706303828fcde524222babb2833864a4bd09e07

Comment 1 Laura Pardo 2018-01-19 15:58:34 EST

Created rsync tracking bugs for this issue:

Affects: fedora-all [bug 1536662]

Comment 3 Pedro Yóssis Silva Barbosa 2018-01-30 13:37:46 EST

Statement:

This issue affects the versions of rsync as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise Linux 6. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

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