Re: CVE Request -- proFTPD (X < 1.3.5.rc1): Symlink race condition when applying UserOwner to a newly (ProFTPD) created directory

[Kurt Seifried <kseifried () redhat com>]

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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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