Fedora 18 : proftpd-1.3.4b-5.fc18 (2013-0437)

Low Nessus Plugin ID 64365

Synopsis

The remote Fedora host is missing a security update.

Description

Jann Horn reported that there is a possible race condition in the handling of the MKD/XMKD FTP commands, when the UserOwner directive is involved, and the attacker is on the same physical machine as a running proftpd. This race applies to mod_sftp and the handling of the MKDIR SFTP request as well.

Note that using the DefaultRoot directive to restrict sessions mitigates this attack, since the symlinks created by the local attacker will point outside of the chroot(2) area within the FTP session, and thus the ownership change will fail. The default configuration in Fedora applies the DefaultRoot directive to all users except 'adm'.

The upstream reference for this issue is:
http://bugs.proftpd.org/show_bug.cgi?id=3841

This update includes upstream's backport to proftpd 1.3.4 of the fix for this issue.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected proftpd package.

See Also

http://bugs.proftpd.org/show_bug.cgi?id=3841

https://bugzilla.redhat.com/show_bug.cgi?id=892715

http://www.nessus.org/u?3a7bfe84

Plugin Details

Severity: Low

ID: 64365

File Name: fedora_2013-0437.nasl

Version: 1.6

Type: local

Agent: unix

Published: 2013/01/31

Updated: 2020/03/12

Dependencies: 12634

Risk Information

Risk Factor: Low

CVSS v2.0

Base Score: 1.2

Vector: CVSS2#AV:L/AC:H/Au:N/C:N/I:P/A:N

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:proftpd, cpe:/o:fedoraproject:fedora:18

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2013/01/08

Reference Information

CVE: CVE-2012-6095

FEDORA: 2013-0437