Conectiva Linux Security Announcement - joe

Dec 11, 2000, 08:30 (0 Talkback[s])

Date: Fri, 8 Dec 2000 17:56:40 -0200
From: secure@CONECTIVA.COM.BR
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: [CLA-2000:356] Conectiva Linux Security Announcement - joe

CONECTIVA LINUX SECURITY ANNOUNCEMENT


PACKAGE   : joe
SUMMARY   : Symlink attack
DATE      : 2000-12-08 17:56:00
ID        : CLA-2000:356
RELEVANT
RELEASES  : 4.0, 4.0es, 4.1, 4.2, 5.0, prg gráficos, ecommerce, 5.1, 6.0

DESCRIPTION "joe" is a small text editor which is also shipped with Conectiva Linux. If joe is closed in a non-standard way (such as receiving an external TERM signal), it will create a file called DEADJOE in the directory where it was called from. If this file is a symbolic link, it will be followed. An attacker could create a symbolic link called DEADJOE in a directory and link it to sensitive system files. If the root user runs joe from that directory, and the program exits abnormally, it would add data to this sensitive file, probably corrupting it.

SOLUTION
All users of the joe editor should upgrade.

ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform upgrades:
- add the following line to /etc/apt/sources.list if it is not there yet (you may also use linuxconf to do this):

rpm [cncbr]
ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

 - 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 can be obtained at
http://www.conectiva.com.br/contato

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Conectiva Linux Security Announcement - joe