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SCO Security Advisory
Subject: OpenLinux: screen buffer overflow
Advisory number: CSSA-2004-011.0
Issue date: 2004 March 02
Cross reference: sr888392 fz528595 erg712512 CAN-2003-0972
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1. Problem Description
Integer signedness error in ansi.c for GNU screen 4.0.1 and
earlier, and 3.9.15 and earlier, could allows local users to
execute arbitrary code via a large number of characters in
escape sequences, which leads to a buffer overflow.
The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CAN-2003-0972 to this issue.
2. Vulnerable Supported Versions
System Package
----------------------------------------------------------------------
OpenLinux 3.1.1 Server prior to screen-3.9.10-2.i386.rpm
OpenLinux 3.1.1 Workstation prior to screen-3.9.10-2.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-2004-011.0/RPMS
4.2 Packages
95d5288f69a948437aa5e078216db7b2 screen-3.9.10-2.i386.rpm
4.3 Installation
rpm -Fvh screen-3.9.10-2.i386.rpm
4.4 Source Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2004-011.0/SRPMS
4.5 Source Packages
4e2ec4db363fdc65d8e46fe3e645d949 screen-3.9.10-2.src.rpm
5. OpenLinux 3.1.1 Workstation
5.1 Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2004-011.0/RPMS
5.2 Packages
7edc6ee34b38dd0b20b4cacdf0899898 screen-3.9.10-2.i386.rpm
5.3 Installation
rpm -Fvh screen-3.9.10-2.i386.rpm
5.4 Source Package Location
ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2004-011.0/SRPMS
5.5 Source Packages
bfe39326a2fffc971856890eea5a1758 screen-3.9.10-2.src.rpm
6. References
Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0972
http://marc.theaimsgroup.com/?l=bugtraq&m=106995837813873&w=2
http://groups.yahoo.com/group/gnu-screen/message/3118
http://www.securitytracker.com/alerts/2003/Nov/1008321.html
SCO security resources:
http://www.sco.com/support/security/index.html
This security fix closes SCO incidents sr888392 fz528595
erg712512.
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 Timo Sirainen
______________________________________________________________________________
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Received on Mar 03 2004
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