[CLA-2003:630] Conectiva Security Announcement - balsa

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CONECTIVA LINUX SECURITY ANNOUNCEMENT

PACKAGE : balsa
SUMMARY : Buffer overflow in IMAP code and in libesmtp
DATE : 2003-04-22 18:01:00
ID : CLA-2003:630
RELEVANT
RELEASES : 8

DESCRIPTION
Balsa is a GNOME email client. It includes code from mutt, wich is a
text-mode email client.

An update[1] for mutt with a fix for a buffer overflow
vulnerability[2] (CAN-2003-0140) in the code that handles IMAP
folders was released in March 14th, 2003.

Balsa 1.2 incorporates the same code from mutt and is vulnerable as
well. An attacker who is able to control an IMAP server accessed by
Balsa can exploit this vulnerability to remotely crash the client or
execute arbitrary code with the privileges of the user running it.
This update fixes this vulnerability.

This announcement also includes a fix for a buffer oveflow
vulnerability found in libesmtp, a library used by Balsa to handle
SMTP conversations. An attacker able to control an SMTP server can
exploit this vulnerability by sending specially crafted responses to
a client that uses libesmtp. These messages can crash the client or
execute arbitrary code in its context.

The Common Vulnerabilities and Exposures (CVE) project has assigned
the name CAN-2002-1090 to this issue[3].

SOLUTION
All users of the packages balsa and libesmtp should upgrade.

Please note that it is necessary to restart the balsa program (if it
is already running) after the upgrade in order to run the new
installed version.

REFERENCES:
1.http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000626
2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0140
3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1090
4.http://distro2.conectiva.com.br/bugzilla/show_bug.cgi?id=8282
5.http://distro2.conectiva.com.br/bugzilla/show_bug.cgi?id=8281

UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/RPMS/balsa-1.2.4-2U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/balsa-help-1.2.4-2U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libesmtp-0.8.12-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libesmtp-devel-0.8.12-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libesmtp-devel-static-0.8.12-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/balsa-1.2.4-2U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libesmtp-0.8.12-1U80_1cl.src.rpm

ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:

• 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

Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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