Ispravljen je sigurnosni propust u radu programskog paketa pure-ftpd na operacijskom sustavu Fedora 14. Riječ je o sigurnom, brzom i jednostavnom FTP (eng. File Transfer Protocol) poslužitelju namijenjenom za distribucije operacijskih sustava Linux i Unix. Problem je vezan uz neodgovarajuću STARTTLS implementaciju. Potencijalni napadač to može iskoristiti za umetanje proizvoljnih naredbi i otkrivanje potencijalno osjetljivih podataka. Svim korisnicima se, u svrhu zaštite, preporučuje nadogradnja alata.

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Fedora Update Notification
FEDORA-2011-3349
2011-03-15 21:08:46
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Name        : pure-ftpd
Product     : Fedora 14
Version     : 1.0.30
Release     : 1.fc14
URL         : http://www.pureftpd.org
Summary     : Lightweight, fast and secure FTP server
Description :
Pure-FTPd is a fast, production-quality, standard-comformant FTP server,
based upon Troll-FTPd. Unlike other popular FTP servers, it has no known
security flaw, it is really trivial to set up and it is especially designed
for modern Linux and FreeBSD kernels (setfsuid, sendfile, capabilities) .
Features include PAM support, IPv6, chroot()ed home directories, virtual
domains, built-in LS, anti-warez system, bandwidth throttling, FXP, bounded
ports for passive downloads, UL/DL ratios, native LDAP and SQL support,
Apache log files and more.
Rebuild switches:
--without ldap     disable ldap support
--without mysql    disable mysql support
--without pgsql    disable postgresql support
--without extauth  disable external authentication
--without tls      disable SSL/TLS

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Update Information:

Wietse Venema and Victor Duchovni discovered and reported an issue that could
lead to a potential information disclosure.

An unencrypted FTP command immediately following STARTTLS request would get
buffered and processed prior to SSL/TLS handshake, resulting in potential
authentication bypass in case a client certificate authentication was configured
to provide user identity.

A report of similar issue that was originally discovered in Postfix MTA
contains further technical details and discusses possible impact:
http://www.postfix.org/CVE-2011-0411.html

Users of pure-ftpd are advised to install this updated package which contains a
fix for the issue.
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ChangeLog:

* Mon Mar 14 2011 Michal Ingeli <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> - 1.0.30-1
- version 1.0.30
- security bug fix #683221 by upstream
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References:

  [ 1 ] Bug #683221 - pure-ftpd: command injection during plaintext to TLS
session switch
        https://bugzilla.redhat.com/show_bug.cgi?id=683221
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This update can be installed with the "yum" update program.  Use 
su -c 'yum update pure-ftpd' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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