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SCO Security Advisory

Subject: OpenServer 5.0.5 OpenServer 5.0.6 OpenServer 5.0.7 : remote buffer overflow in sendmail (CERT CA-2003-07)
Advisory number: CSSA-2003-SCO.6
Issue date: 2003 March 12
Cross reference:
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1. Problem Description

From CA-2003-07: Researchers at Internet Security Systems
(ISS) have discovered a remotely exploitable vulnerability
in sendmail. This vulnerability could allow an intruder to
gain control of a vulnerable sendmail server.

2. Vulnerable Supported Versions

System Vulnerable Versions
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OpenServer 5.0.5 previous to sendmail 8.11.0a
OpenServer 5.0.6 previous to sendmail 8.11.0a
OpenServer 5.0.7 previous to sendmail 8.11.0a

3. Solution

The proper solution is to install the latest packages.

4. OpenServer 5.0.5

4.1 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.6

4.2 Verification

MD5 (sendmail.506.tar) = da105d0a82313ed19bc10b515467e93f

md5 is available for download from
ftp://ftp.sco.com/pub/security/tools

4.3 Installing Fixed Binaries

Upgrade the affected binaries with the following sequence:

1) Download the sendmail.506.tar file to the /tmp directory
(OpenServer 5.0.5 uses the 5.0.6 tar image)

2) Extract the files from the tar archive:
cd /tmp; tar xvf sendmail.506.tar

3) Run the custom command, specify an install from media
images, and specify the /tmp directory as the location of
the images.

5. OpenServer 5.0.6

5.1 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.6

5.2 Verification

MD5 (sendmail.506.tar) = da105d0a82313ed19bc10b515467e93f

md5 is available for download from
ftp://ftp.sco.com/pub/security/tools

5.3 Installing Fixed Binaries

Upgrade the affected binaries with the following sequence:

1) Download the sendmail.506.tar file to the /tmp directory

2) Extract the files from the tar archive:
cd /tmp; tar xvf sendmail.506.tar

3) Run the custom command, specify an install from media
images, and specify the /tmp directory as the location of
the images.

6. OpenServer 5.0.7

6.1 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.6

6.2 Verification

MD5 (sendmail.507.tar) = 807f1fa8d15a3361a589119bfca18533

md5 is available for download from
ftp://ftp.sco.com/pub/security/tools

6.3 Installing Fixed Binaries

Upgrade the affected binaries with the following sequence:

1) Download the sendmail.507.tar file to the /tmp directory

2) Extract the files from the tar archive:
cd /tmp; tar xvf sendmail.507.tar

3) Run the custom command, specify an install from media
images, and specify the /tmp directory as the location of
the images.

7. References

Specific references for this advisory:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1337
http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21950
http://www.cert.org/advisories/CA-2003-07.html
http://www.kb.cert.org/vuls/id/398025
http://www.sendmail.org/8.12.8.html

SCO security resources:

http://www.sco.com/support/security/index.html

This security fix closes SCO incidents sr875284, fz527484,
erg712247.

8. Disclaimer

SCO is not responsible for the misuse of any of the information
we provide on this website and/or through our security
advisories. Our advisories are a service to our customers
intended to promote secure installation and use of SCO
products.

9. Acknowledgements

Internet Security Systems, Inc. discovered and researched
this vulnerability.

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