UnixWare 7.1.4 UnixWare 7.1.3 : The error handling in the inflate and inflateBack functions in ZLib compression library allows local users to cause a denial of service
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SCO Security Advisory
Subject: UnixWare 7.1.4 UnixWare 7.1.3 : The error handling in
the inflate and inflateBack functions in ZLib compression library allows local
users to cause a denial of service
Advisory number: SCOSA-2004.17
Issue date: 2004 October 18
Cross reference: sr891410 fz530158 erg712692 VU#238678 CAN-2004-0797
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1. Problem Description
CERT Vulnerability Note VU#238678 Un-handled error conditions
in the zlib compression library may allow an attacker to
cause a denial-of-service condition.
The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the following name
CAN-2004-0797 to this issue.
2. Vulnerable Supported Versions
System Binaries
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UnixWare 7.1.4 /usr/include/zconf.h
/usr/include/zlib.h
/usr/lib/libz.so.1.2.1
UnixWare 7.1.3 /usr/include/zconf.h
/usr/include/zlib.h
/usr/lib/libz.so.1.2.1
3. Solution
The proper solution is to install the latest packages.
4. UnixWare 7.1.4
4.1 Location of Fixed Binaries
ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2004.17
4.2 Verification
MD5 (erg712692.714.pkg) = 0b56f889838a2daaed77f8251922391e
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:
Download erg712692.714.pkg to the /var/spool/pkg directory
# pkgadd -d /var/spool/pkg/erg712692.714.pkg
5. UnixWare 7.1.3
5.1 Location of Fixed Binaries
ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2004.17
5.2 Verification
MD5 (erg712692.pkg) = 5c48d63e7f5922dccf38f6d6fa66b325
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:
Download erg712692.pkg to the /var/spool/pkg directory
# pkgadd -d /var/spool/pkg/erg712692.pkg
6. References
Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0797
SCO security resources:
http://www.sco.com/support/security/index.html
SCO security advisories via email
http://www.sco.com/support/forums/security.html
This security fix closes SCO incidents sr891410 fz530158
erg712692.
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. Acknowledgments
SCO would like to thank Johan Thelmen for his help in finding
and fixing this bug.
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