Bug 746713 – CVE-2011-3632 hardlink: Prone to symlink attacks

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Bug 746713 - (CVE-2011-3632) CVE-2011-3632 hardlink: Prone to symlink attacks

Summary:	CVE-2011-3632 hardlink: Prone to symlink attacks

Status:	NEW

Aliases:	CVE-2011-3632

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

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

URL:
Whiteboard:	impact=low,public=20111015,reported=2...
Keywords:	Security

Depends On:	746715
Blocks:	746750
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Reported:	2011-10-17 11:38 EDT by Jan Lieskovsky
Modified:	2018-06-21 04:53 EDT (History)
CC List:	0 users

See Also:
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Doc Type:	Bug Fix
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RHEL 7.3 requirements from Atomic Host:
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Description Jan Lieskovsky 2011-10-17 11:38:18 EDT

It was reported, that hardlink, the tool for consolidation of duplicate files via hardlinks operated on full file system objects path names. A local attacker could use this flaw to conduct symlink attacks (cause the hardlink executable to operate on directories / files outside of the intended directory tree).

References:
[1] http://www.openwall.com/lists/oss-security/2011/10/15/2
[2] https://bugs.gentoo.org/show_bug.cgi?id=387269
[3] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=645516

Proposed patch (applied by the Owl Linux distribution):
[Adds section BUGS into the hardlink(1) man page documenting the danger]
[4] http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/hardlink/hardlink.1.diff?r1=1.1;r2=1.2

Comment 1 Jan Lieskovsky 2011-10-17 11:40:12 EDT

This issue affect the versions of the hardlink package, as shipped with Fedora release of 14 and 15. Please schedule an update.

Comment 2 Jan Lieskovsky 2011-10-17 11:42:19 EDT

Created hardlink tracking bugs for this issue

Affects: fedora-all [bug 746715]

Comment 3 Jan Lieskovsky 2011-10-17 12:50:40 EDT

This issue affect the versions of the hardlink package, as shipped with
Red Hat Enterprise Linux 5 and 6.

Comment 4 Jan Lieskovsky 2011-10-20 11:48:00 EDT

The CVE identifier of CVE-2011-3632 has been assigned to this issue:
[5] http://www.openwall.com/lists/oss-security/2011/10/20/6

Comment 6 Huzaifa S. Sidhpurwala 2011-10-28 01:17:53 EDT

Statement:

The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw in hardlink.

Comment 7 Fedora Update System 2011-11-23 18:27:54 EST

hardlink-1.0-12.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2011-12-11 16:50:09 EST

hardlink-1.0-12.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.

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