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From: please_reply_to_security at sco.com (please_reply_to_security@....com) Subject: UnixWare 7.1.3 Open UNIX 8.0.0 : Xsco contains a buffer overflow that could be exploited to gain root privileges. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SCO Security Advisory Subject: UnixWare 7.1.3 Open UNIX 8.0.0 : Xsco contains a buffer overflow that could be exploited to gain root privileges. Advisory number: SCOSA-2004.2 Issue date: 2004 July 29 Cross reference: sr889370 fz528865 erg712546 CAN-2004-0083 CAN-2004-0084 CAN-2004-0106 ______________________________________________________________________________ 1. Problem Description A buffer overflow in ReadFontAlias from dirfile.c of Xsco may allow local users and remote attackers to execute arbitrary code via a font alias file with a long token. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0083 to this issue. Buffer overflow in the ReadFontAlias function in Xsco, when using the CopyISOLatin1Lowered function, may allow local or remote authenticated users to execute arbitrary code via a malformed entry in the font alias file. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0084 to this issue. Multiple flaws in reading font files. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0106 to these issues. 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- UnixWare 7.1.3 /usr/X/bin/Xsco Open UNIX 8.0.0 /usr/X/bin/Xsco 3. Solution The proper solution is to install the latest packages. 4. UnixWare 7.1.3 / Open UNIX 8.0.0 4.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2004.2 4.2 Verification MD5 (erg712546.pkg.Z) = a7ca45fddc3990268e2779a16601b323 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 erg712546.pkg.Z to the /var/spool/pkg directory # uncompress /var/spool/pkg/erg712546.pkg.Z # pkgadd -d /var/spool/pkg/erg712546.pkg 5. References Specific references for this advisory: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0083 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0084 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0106 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 sr889370 fz528865 erg712546. 6. 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. 7. Acknowledgments Greg MacManus (iDEFENSE Labs) is credited with the discovery of this vulnerability. Additionally David Dawes discovered further flaws in reading font files. ______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (SCO/UNIX_SVR5) iD8DBQFBCqGxaqoBO7ipriERAkoyAJ91gL8wb8JakO+PD8UAu5ud2P/zbACgllGF CROJ3rJtJ5iFKT7lahBbwcQ= =OdyX -----END PGP SIGNATURE-----
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