Caldera UnixWare CDE dtlogin error log directory /var/dt/ symlink

unixware-dtlogin-log-symlink (7864) The risk level is classified as MediumMedium Risk

Description:

The CDE dtlogin utility in Caldera UnixWare logs errors to the /var/dt/Xerrors file with 777 permissions. A local attacker could create a symbolic link from /var/dt/Xerrors to any file on the system, which would be overwritten once a unsuccessful remote login occurs. An attacker could use this vulnerability to overwrite critical system files and cause a denial of service or gain elevated privileges on the system.


Consequences:

File Manipulation

Remedy:

No remedy available as of September 1, 2014.

References:

  • BugTraq Mailing List, Tue Jan 08 2002 - 00:13:59 CST: CDE bug in Unixware 7.1.
  • BID-3818: UnixWare CDE DTLogin Log Directory Insecure Permissions Vulnerability
  • CVE-2002-0105: CDE dtlogin in Caldera UnixWare 7.1.0, and possibly other operating systems, allows local users to gain privileges via a symlink attack on /var/dt/Xerrors since /var/dt is world-writable.
  • OSVDB ID: 9331: SCO UnixWare dtlogin Xerrors Symlink Privilege Escalation

Platforms Affected:

  • SCO Caldera UnixWare 7.1.0

Reported:

Jan 08, 2002

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