To: bugtraqat_private announceat_private scoannmodat_private ______________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: OpenServer 5.0.5 OpenServer 5.0.6 : yppasswdd remotely exploitable buffer overflow Advisory number: CSSA-2002-SCO.19 Issue date: 2002 May 20 Cross reference: ______________________________________________________________________________ 1. Problem Description A buffer overflow vulnerability has been discovered in /etc/yppasswdd which may be exploited by a local or a remote attacker to gain root access on the NIS master server system. 2. Vulnerable Supported Versions System Binaries ---------------------------------------------------------------------- OpenServer 5.0.5 /etc/yppasswdd OpenServer 5.0.6 /etc/yppasswdd 3. Solution The proper solution is to install the latest packages. 4. OpenServer 5.0.5 4.1 Location of Fixed Binaries ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.19 4.2 Verification MD5 (VOL.000.000) = d683b9007da3efc51a9f6f9db7270ec2 md5 is available for download from ftp://stage.caldera.com/pub/security/tools/ 4.3 Installing Fixed Binaries Upgrade the affected binaries with the following commands: 1) Download the VOL* files to the /tmp directory Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 5. OpenServer 5.0.6 5.1 Location of Fixed Binaries ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.19 5.2 Verification MD5 (VOL.000.000) = d683b9007da3efc51a9f6f9db7270ec2 md5 is available for download from ftp://stage.caldera.com/pub/security/tools/ 5.3 Installing Fixed Binaries Upgrade the affected binaries with the following commands: 1) Download the VOL* files to the /tmp directory Run the custom command, specify an install from media images, and specify the /tmp directory as the location of the images. 6. References Specific references for this advisory: http://www.kb.cert.org/vuls/id/327281 Caldera UNIX security resources: http://stage.caldera.com/support/security/ Caldera OpenLinux security resources: http://www.caldera.com/support/security/index.html This security fix closes Caldera incidents sr854485, SCO-559-1316, and erg711875 . 7. Disclaimer Caldera International, Inc. 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 Caldera products. ______________________________________________________________________________
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