Title: Solaris mailx Lockfile Denial Of Service Vulnerability
Severity: LOW
Description:
mailx is a Mail User Agent distributed with most UNIX Operating Systems. A problem exists with the implementation of mailx distributed with Solaris.
The problem involves lockfiles in the /var/mail directory. By default, the /var/mail directory is world writable as deployed with the Solaris Operating Environment. When a file is created in the /var/mail directory using the extension $LOGNAME.lock, it is possible to deny service to a legitimate user of mailx if the $LOGNAME.lock file is not removable by the mailx user. This problem makes it possible for a user with malicious intent to deny service to any user of mailx.
Affected Products:
- Sun Solaris 2.6
- Sun Solaris 7.0
- Sun Solaris 8
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