Bug 746713 (CVE-2011-3632) - CVE-2011-3632 hardlink: Prone to symlink attacks
Summary: CVE-2011-3632 hardlink: Prone to symlink attacks
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2011-3632
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 746715
Blocks: 746750
TreeView+ depends on / blocked
 
Reported: 2011-10-17 15:38 UTC by Jan Lieskovsky
Modified: 2019-09-29 12:48 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2019-06-10 10:58:07 UTC
Embargoed:

Attachments (Terms of Use)

Description Jan Lieskovsky 2011-10-17 15:38:18 UTC 
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 15:40:12 UTC 
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 15:42:19 UTC 
Created hardlink tracking bugs for this issue

Affects: fedora-all [bug 746715]
Comment 3 Jan Lieskovsky 2011-10-17 16:50:40 UTC 
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 15:48:00 UTC 
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 7 Fedora Update System 2011-11-23 23:27:54 UTC 
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 21:50:09 UTC 
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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