SOT Linux Advisory: sendmail

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SOT Linux Security Advisory

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1. Problem description

Sendmail is a widely used Mail Transport Agent (MTA).

There is a vulnerability in sendmail that can be exploited to
cause a denial-of-service condition and could allow a remote
attacker to execute arbitrary code with the privileges of the
sendmail daemon, typically root.

Also a bug has been discovered in the handling of DNS maps in
Sendmail 8.12 versions before 8.12.9. A remote attacker can exploit
this issue to crash the instance of Sendmail dealing with the
request. We believe that the nature of the bug would make remote
exploitation of this issue difficult, if at all possible. The
Common Vulnerabilities and Exposures project (cve.mitre.org//) has assigned the name
CAN-2003-0688 to this issue.

Sendmail users are advised to update to the packages contained
within this erratum which include a backported patch to correct
this vulnerability.

2. Updated packages

SOT Linux 2003 Desktop:

ftp://ftp.sot.com/updates/2003/Desktop/i386/sendmail-8.12.7-2.i386.rpm

SRPMS:

ftp://ftp.sot.com/updates/2003/Desktop/SRPMS/sendmail-8.12.7-2.src.rpm

SOT Linux 2003 Server:

i386:

ftp://ftp.sot.com/updates/2003/Server/i386/sendmail-8.12.7-2.i386.rpm

SRPMS:

ftp://ftp.sot.com/updates/2003/Server/SRPMS/sendmail-8.12.7-2.src.rpm

3. Upgrading package

Before applying this update, make sure all previously released
errata relevant to your system have been applied.

Use up2date to automatically upgrade the fixed packages.

If you want to upgrade manually, download the updated package
from the SOT Linux FTP site (use the links above) or from one of
our mirrors. The list of mirrors can be obtained at www.sot.com/en/linux

Update the package with the following command: rpm -Uvh
<filename>

4. Verification

All packages are PGP signed by SOT for security.

You can verify each package with the following command: rpm
–checksig <filename>

If you wish to verify the integrity of the downloaded package,
run “md5sum <filename>” and compare the output with data
given below.

Package Name MD5 sum

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/Desktop/i386/sendmail-8.12.7-2.i386.rpm
8c3ed392bc664fdd7e66c3c24241a6d2
/Desktop/SRPMS/sendmail-8.12.7-2.src.rpm
7b0efd9864a4d11ff13c40548c01f3a6
/Server/i386/sendmail-8.12.7-2.i386.rpm
8c3ed392bc664fdd7e66c3c24241a6d2
/Server/SRPMS/sendmail-8.12.7-2.src.rpm
7b0efd9864a4d11ff13c40548c01f3a6

5. References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0161

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0688

Copyright(c) 2001-2003 SOT