linux-ftpd-ssl: CVE-2007-6263 remote denial of service

Debian Bug report logs - #454733
linux-ftpd-ssl: CVE-2007-6263 remote denial of service

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Nico Golde <nion@debian.org>

To: submit@bugs.debian.org

Subject: linux-ftpd-ssl: CVE-2007-6263 remote denial of service

Date: Fri, 7 Dec 2007 13:47:27 +0100

[Message part 1 (text/plain, inline)]

Package: linux-ftpd-ssl
Version: 0.17.18+0.3-3sarge1
Severity: important
Tags: security

Hi,
the following CVE (Common Vulnerabilities & Exposures) id was
published for linux-ftpd-ssl.

CVE-2007-6263[0]:
| The dataconn function in ftpd.c in netkit ftpd (netkit-ftpd) 0.17,
| when certain modifications to support SSL have been introduced, calls
| fclose on an uninitialized file stream, which allows remote attackers
| to cause a denial of service (daemon crash) and possibly have
| unspecified other impact via some types of FTP over SSL protocol
| behavior, as demonstrated by breaking a passive FTP DATA connection in
| a way that triggers an error in the server's SSL_accept function.
| NOTE: the netkit ftp issue is covered by CVE-2007-5769.

If you fix this vulnerability please also include the CVE id
in your changelog entry.

For further information:
[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6263

Kind regards
Nico

-- 
Nico Golde - http://www.ngolde.de - nion@jabber.ccc.de - GPG: 0x73647CFF
For security reasons, all text in this mail is double-rot13 encrypted.

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Message #12 received at 454733@bugs.debian.org (full text, mbox, reply):

From: Nico Golde <nion@debian.org>

To: 454733@bugs.debian.org

Cc: control@bugs.debian.org

Subject: Re: linux-ftpd-ssl: CVE-2007-6263 remote denial of service

Date: Mon, 10 Dec 2007 18:46:26 +0100

[Message part 1 (text/plain, inline)]

tags 454733 + patch
thanks

Hi,
attached is a patch for an NMU which fixes the described 
security issue.
It will be also archived on:
http://people.debian.org/~nion/nmu-diff/linux-ftpd-ssl-0.17.18+0.3-9_0.17.18+0.3-9.1.patch

Kind regards
Nico

-- 
Nico Golde - http://www.ngolde.de - nion@jabber.ccc.de - GPG: 0x73647CFF
For security reasons, all text in this mail is double-rot13 encrypted.

[linux-ftpd-ssl-0.17.18+0.3-9_0.17.18+0.3-9.1.patch (text/x-diff, attachment)]

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Message #19 received at 454733-close@bugs.debian.org (full text, mbox, reply):

From: Nico Golde <nion@debian.org>

To: 454733-close@bugs.debian.org

Subject: Bug#454733: fixed in linux-ftpd-ssl 0.17.18+0.3-9.1

Date: Wed, 12 Dec 2007 18:02:03 +0000

Source: linux-ftpd-ssl
Source-Version: 0.17.18+0.3-9.1

We believe that the bug you reported is fixed in the latest version of
linux-ftpd-ssl, which is due to be installed in the Debian FTP archive:

ftpd-ssl_0.17.18+0.3-9.1_i386.deb
  to pool/main/l/linux-ftpd-ssl/ftpd-ssl_0.17.18+0.3-9.1_i386.deb
linux-ftpd-ssl_0.17.18+0.3-9.1.diff.gz
  to pool/main/l/linux-ftpd-ssl/linux-ftpd-ssl_0.17.18+0.3-9.1.diff.gz
linux-ftpd-ssl_0.17.18+0.3-9.1.dsc
  to pool/main/l/linux-ftpd-ssl/linux-ftpd-ssl_0.17.18+0.3-9.1.dsc



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 454733@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Nico Golde <nion@debian.org> (supplier of updated linux-ftpd-ssl package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Mon, 10 Dec 2007 18:34:40 +0100
Source: linux-ftpd-ssl
Binary: ftpd-ssl
Architecture: source i386
Version: 0.17.18+0.3-9.1
Distribution: unstable
Urgency: high
Maintainer: Cai Qian <caiqian@debian.org>
Changed-By: Nico Golde <nion@debian.org>
Description: 
 ftpd-ssl   - FTP server with SSL encryption support
Closes: 454733
Changes: 
 linux-ftpd-ssl (0.17.18+0.3-9.1) unstable; urgency=high
 .
   * Non-maintainer upload by the testing-security team.
   * Fix remote denial of service cause by passing an
     uninitialized file stream to fopen().Initializing file
     with NULL and checking for NULL before calling fclose()
     fixes this (CVE-2007-6263; Closes: #454733).
Files: 
 e58996ec981d3f364968ae4ab23f12e6 633 net extra linux-ftpd-ssl_0.17.18+0.3-9.1.dsc
 86df550e414d9d2d34a8dce80b6d433e 6484 net extra linux-ftpd-ssl_0.17.18+0.3-9.1.diff.gz
 d8290f3a9cce071534c571a04ab30fc8 49166 net extra ftpd-ssl_0.17.18+0.3-9.1_i386.deb

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