To: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca full-disclosure@lists.netsys.com ______________________________________________________________________________ SCO Security Advisory Subject: UnixWare 7.1.1 Open UNIX 8.0.0 : in.talkd format string vulnerabilities Advisory number: CSSA-2002-SCO.42 Issue date: 2002 November 12 Cross reference: ______________________________________________________________________________ 1. Problem Description The in.talkd program is vulnerable to a format string bug which can be exploited remotely. An attacker can request a talk session with a crafted luser field and be able to write memory and gain control of the flow of the in.talkd. This vulnerability can also be exploited with the clt_addr field and its resolved name (in conjuction with a DNS). 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- UnixWare 7.1.1 /usr/sbin/in.otalkd /usr/sbin/in.talkd Open UNIX 8.0.0 /usr/sbin/in.otalkd /usr/sbin/in.talkd 3. Solution The proper solution is to install the latest packages. 4. UnixWare 7.1.1 4.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.42 4.2 Verification MD5 (erg712055.pkg.Z) = 5cd91b194857bb3149efee8bf6e3e804 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 erg712055.pkg.Z to the /var/spool/pkg directory # uncompress /var/spool/pkg/erg712055.pkg.Z # pkgadd -d /var/spool/pkg/erg712055.pkg 5. Open UNIX 8.0.0 5.1 Location of Fixed Binaries ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.42 5.2 Verification MD5 (erg712055.pkg.Z) = 5cd91b194857bb3149efee8bf6e3e804 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 erg712055.pkg.Z to the /var/spool/pkg directory # uncompress /var/spool/pkg/erg712055.pkg.Z # pkgadd -d /var/spool/pkg/erg712055.pkg 6. References Specific references for this advisory: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-1010 http://www.ngsec.com/docs/advisories/NGSEC-2002-3.txt SCO security resources: http://www.sco.com/support/security/index.html This security fix closes SCO incidents sr864879, fz521053, erg712055. 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 It is difficult to say who actually discovered this vulnerability. There are many candidates. ______________________________________________________________________________
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