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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : vixie-cron
SUMMARY   : Local vulnerability [Update to CLSA-2003:628]
DATE      : 2003-10-03 14:46:00
ID        : CLA-2003:757
RELEVANT
RELEASES  : 8

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DESCRIPTION
 The vixie-cron package contains the Vixie version of cron. Cron is a
 standard UNIX daemon that runs specified programs at scheduled
 times.
 
 [Update 2003-Oct-03]
 This advisory is an update for the CLSA-2003:628[] one. The packages
 released for Conectiva Linux 8 (vixie-cron-3.0.1-50U80_1cl) did not
 contain the corresponding fixes.
 
 The ISS X-Force team found a local vulnerability[1] in vixie-cron
 that may allow users to obtain root privileges in a system running
 it. The crontab utility, which is part of the vixie-cron package and
 is suid root, is used by local users to schedule their jobs. Due to a
 failure in the dropping of root privileges in certain circumstances,
 it is possible for an attacker to gain root privileges by exploiting
 this vulnerability.
 
 The Common Vulnerabilities and Exposures (CVE) project has assigned
 the name CVE-2001-0559 to this issue[2].
 
 This update corrects this vulnerability and adds a fix[3] for a
 problem regarding a leak of read-only file descriptors of the
 /etc/cron.allow and /etc/cron.deny files to the users' text editor
 during crontab modifications. Although these files are not
 distributed with Conectiva Linux, the system administrator can create
 them to restrict access to the cron service.


SOLUTION
 All users should upgrade.
 
 
 REFERENCES:
 1.http://www.iss.net/security_center/static/6508.php
 2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0559
 3.http://distro2.conectiva.com.br/bugzilla/show_bug.cgi?id=7852
 4.http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000628&idioma=en


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/RPMS/vixie-cron-3.0.1-50U80_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/vixie-cron-3.0.1-50U80_2cl.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

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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

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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

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