Title: Slackware World-Writable Valid Shell List Vulnerability
Severity: MODERATE
Description:
A vulnerability exists in Slackware Linux version 7.1.
During the default installation of Slackware Linux, the /etc/shells file is installed with world-writable permissions. This text file contains the full pathnames of valid login shells, and is commonly used by services such as ftp to check the validity of a user's shell during authentication.
By removing data from the /etc/shells file, a local attacker could effectively cause a denial of service to users attempting to use applications which rely on the data contained in the file.
Affected Products:
- Slackware Linux 7.1.0
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