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Home » Hacking News » [CLA-2003:571] Conectiva Linux Security Announcement - sendmail

[CLA-2003:571] Conectiva Linux Security Announcement - sendmail

by Nikola Strahija on March 4th, 2003 Researchers at ISS[2] discovered and published[3] a remote vulnerability[4][5] in sendmail that could be used by an attacker to execute arbitrary code as root.


PACKAGE : sendmail
SUMMARY : Remote vulnerability
DATE : 2003-03-03 19:30:00
ID : CLA-2003:571
RELEVANT
RELEASES : 6.0, 7.0, 8

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DESCRIPTION
Sendmail[1] is a widely used Mail Transfer Agent (MTA).

Researchers at ISS[2] discovered and published[3] a remote
vulnerability[4][5] in sendmail that could be used by an attacker to
execute arbitrary code as root.

This vulnerability can be exploited by creating and sending to a
vulnerable sendmail server a carefully crafted email message. This
message will trigger the vulnerability and arbitrary commands can be
executed with administrative privileges.

Please note that non-vulnerable mail servers can be used to pass such
messages along so that, for example, even internal sendmail servers
could be reached.

Starting with Conectiva Linux 7.0, sendmail is no longer the default
mail server and has been replaced with Postfix. But sendmail is still
shipped in all Conectiva Linux versions.

As with many other services, the email service, even if installed, is
not started by default in Conectiva Linux.

The Common Vulnerabilities and Exposures (CVE) project has assigned
the name CAN-2002-1337[7] to this issue.


SOLUTION
All sendmail users should upgrade their packages immediately. After
the upgrade, the sendmail service will be automatically restarted if
it was already running.


REFERENCES
1.http://www.sendmail.org/
2.http://www.iss.net/
3.http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21950
4.http://www.cert.org/advisories/CA-2003-07.html
5.http://www.kb.cert.org/vuls/id/398025
6.http://www.sendmail.com/security/
7.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1337


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/sendmail-8.11.6-1U60_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-8.11.6-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-cf-8.11.6-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-doc-8.11.6-1U60_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/sendmail-8.11.6-1U70_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-8.11.6-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-cf-8.11.6-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-doc-8.11.6-1U70_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/sendmail-8.11.6-2U80_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-8.11.6-2U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-cf-8.11.6-2U80_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-doc-8.11.6-2U80_3cl.i386.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


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

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