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Home » Hacking News » [CLA-2002:552] Conectiva Linux Security Announcement - wget

[CLA-2002:552] Conectiva Linux Security Announcement - wget

by Nikola Strahija on December 13th, 2002 The vulnerability resides in the way wget handles server answers to LIST and multiple GET requests. If the filenames in the answer begin with characters pointing to parent directories (like "../" or "/"), wget can download files to that location, thus overwritting arbitrary files.


PACKAGE : wget
SUMMARY : Directory transversal vulnerability
DATE : 2002-12-13 18:23:00
ID : CLA-2002:552
RELEVANT
RELEASES : 6.0, 7.0, 8

- -------------------------------------------------------------------------

DESCRIPTION
GNU wget is a freely available network utility to retrieve files
using HTTP and FTP.

Steven M. Christey reported[1] a vulnerability[2] in some ftp
clients, including wget up to version 1.8.2 (inclusive).

The vulnerability resides in the way wget handles server answers to
LIST and multiple GET requests. If the filenames in the answer begin
with characters pointing to parent directories (like "../" or "/"),
wget can download files to that location, thus overwritting arbitrary
files.

The version 1.8.2 distributed together with this advisory fixes that
vulnerability and some other minor bugs besides adding some new
features[3].


SOLUTION
All wget users are advised to upgrade.


REFERENCES:
1.http://www.kb.cert.org/vuls/id/210409
2.http://marc.theaimsgroup.com/?l=bugtraq&m=87602746719482
3.http://cvs.sunsite.dk/viewcvs.cgi/wget/NEWS?rev=WGET_1_8&content-type=text/plain
4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1344


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/wget-1.8.2-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/wget-1.8.2-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/wget-1.8.2-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/wget-1.8.2-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/wget-1.8.2-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/wget-1.8.2-1U80_1cl.src.rpm


ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:

- run: apt-get update
- after that, execute: apt-get upgrade

Detailed instructions reagarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en


- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en


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