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Re: CVE Request -- proFTPD (X < 1.3.5.rc1): Symlink race condition when applying UserOwner to a newly (ProFTPD) created directory
From: Kurt Seifried <kseifried () redhat com>
Date: Mon, 07 Jan 2013 14:17:11 -0700

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On 01/07/2013 09:55 AM, Jan Lieskovsky wrote:
Hello Kurt, Steve, vendors,

proFTPD upstream has recently released v1.3.5.rc1 release: [1]
http://proftpd.org/docs/NEWS-1.3.5rc1 correcting one security
issue:

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 the UserOwner ownership was
applied.

Upstream bug report: [2]
http://bugs.proftpd.org/show_bug.cgi?id=3841

Relevant upstream patch: [3]
http://bugs.proftpd.org/show_bug.cgi?id=3841#c8

References: [4]
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=697524 [5]
https://bugzilla.redhat.com/show_bug.cgi?id=892715

Could you allocate a CVE id for this?

Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat
Security Response Team


Please use CVE-2012-6095 for this issue.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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