Bug 892715 (CVE-2012-6095) - CVE-2012-6095 proftpd: Symlink race condition when applying UserOwner to a newly (ProFTPD) created directory
Summary: CVE-2012-6095 proftpd: Symlink race condition when applying UserOwner to a ne...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2012-6095
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 892718 892719
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-01-07 16:47 UTC by Jan Lieskovsky
Modified: 2019-09-29 12:58 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-08-19 09:39:17 UTC


Attachments (Terms of Use)

Description Jan Lieskovsky 2013-01-07 16:47:28 UTC
A time-of-check time-of-use (TOCTOU) race condition flaw was found in the way ProFTPD, flexible, stable and highly-configurable FTP server, handled MKD/XMKD FTP commands when the UserOwner directive was involved. A local attacker could use this flaw to possibly escalate their privileges via symbolic-link attacks on directories, created by ProFTPD prior UserOwner ownership was applied.

Upstream bug report:
[1] http://bugs.proftpd.org/show_bug.cgi?id=3841

Relevant upstream patch:
[2] http://bugs.proftpd.org/show_bug.cgi?id=3841#c8

References:
[3] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=697524

Comment 1 Jan Lieskovsky 2013-01-07 16:50:38 UTC
This issue affects the versions of the proftpd package, as shipped with Fedora release of 16 and 17. Please schedule an update.

--

This issue affects the versions of the proftpd package, as shipped with Fedora EPEL 5 and 6. Please schedule an update.

Comment 2 Jan Lieskovsky 2013-01-07 16:51:58 UTC
Created proftpd tracking bugs for this issue

Affects: fedora-all [bug 892718]
Affects: epel-all [bug 892719]

Comment 3 Jan Lieskovsky 2013-01-08 11:30:37 UTC
The CVE identifier of CVE-2012-6095 has been assigned to this issue:
  http://www.openwall.com/lists/oss-security/2013/01/07/3

Comment 4 Fedora Update System 2013-01-30 00:31:11 UTC
proftpd-1.3.4b-5.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2013-01-30 00:31:39 UTC
proftpd-1.3.4b-5.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2013-01-30 00:58:54 UTC
proftpd-1.3.4b-5.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2013-02-05 21:22:37 UTC
proftpd-1.3.3g-2.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2013-02-05 21:25:28 UTC
proftpd-1.3.3g-2.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Paul Howarth 2013-08-19 09:19:19 UTC
This has been addressed in all current Fedora and EPEL releases. Can we close the bug now?

Comment 10 Tomas Hoger 2013-08-19 09:39:17 UTC
Yes, thank you!


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