Date: Mon, 17 Nov 2003 14:23:48 -0800 (PST)
From: [email protected]
To: [email protected], [email protected],
Subject: OpenLinux: Sendmail prescan remotely exploitable vulnerability
To: [email protected][email protected][email protected][email protected]
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______________________________________________________________________________
SCO Security Advisory
Subject: OpenLinux: Sendmail prescan remotely exploitable vulnerability
Advisory number: CSSA-2003-036.0
Issue date: 2003 November 17
Cross reference: sr884726 fz528319 erg712432
______________________________________________________________________________
1. Problem Description
There seems to be a remotely exploitable vulnerability affecting
Sendmail up to including the latest version, 8.12.9. The problem
lies in prescan() function.
CAN-2003-0694 The prescan function in Sendmail 8.12.9 allows
remote attackers to execute arbitrary code via buffer overflow
attacks, as demonstrated using the parseaddr function in
parseaddr.c.
2. Vulnerable Supported Versions
System Package
----------------------------------------------------------------------
OpenLinux 3.1.1 Server prior to sendmail-8.11.6-15.i386.rpm
prior to sendmail-cf-8.11.6-15.i386.rpm
prior to sendmail-doc-8.11.6-15.i386.rpm
OpenLinux 3.1.1 Workstation prior to sendmail-8.11.6-15.i386.rpm
prior to sendmail-cf-8.11.6-15.i386.rpm
prior to sendmail-doc-8.11.6-15.i386.rpm
3. Solution
The proper solution is to install the latest packages. Many
customers find it easier to use the Caldera System Updater, called
cupdate (or kcupdate under the KDE environment), to update these
packages rather than downloading and installing them by hand.
4. OpenLinux 3.1.1 Server
4.1 Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2003-036.0/RPMS
4.2 Packages
d83fb7296cf6fce2d1af8212bda7dd46 sendmail-8.11.6-15.i386.rpm
ac25d7e2a9aaddcce08aad001b6d7241 sendmail-cf-8.11.6-15.i386.rpm
9f7b9c04f75384843ba6b54689236dc2 sendmail-doc-8.11.6-15.i386.rpm
4.3 Installation
rpm -Fvh sendmail-8.11.6-15.i386.rpm
rpm -Fvh sendmail-cf-8.11.6-15.i386.rpm
rpm -Fvh sendmail-doc-8.11.6-15.i386.rpm
4.4 Source Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2003-036.0/SRPMS
4.5 Source Packages
8b1dab8855ac4e1a25b336b58dcf1772 sendmail-8.11.6-15.src.rpm
5. OpenLinux 3.1.1 Workstation
5.1 Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2003-036.0/RPMS
5.2 Packages
9931dfc45eb2d041278b9552bc9f2043 sendmail-8.11.6-15.i386.rpm
0fa48f065798774025c9359eac9bc293 sendmail-cf-8.11.6-15.i386.rpm
3619371879178cb82292c859a76208c6 sendmail-doc-8.11.6-15.i386.rpm
5.3 Installation
rpm -Fvh sendmail-8.11.6-15.i386.rpm
rpm -Fvh sendmail-cf-8.11.6-15.i386.rpm
rpm -Fvh sendmail-doc-8.11.6-15.i386.rpm
5.4 Source Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2003-036.0/SRPMS
5.5 Source Packages
960a4ed05febec0d0480114c75d29065 sendmail-8.11.6-15.src.rpm
6. References
Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0694
SCO security resources:
http://www.sco.com/support/security/index.html
This security fix closes SCO incidents sr884726 fz528319
erg712432.
7. 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.
8. Acknowledgements
SCO would like to thank Michal Zalewski for reporting this issue.
______________________________________________________________________________
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