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TITLE:
XWine Insecure Temporary File Handling and Configuration File
Permissions

SECUNIA ADVISORY ID:
SA29125

VERIFY ADVISORY:
http://secunia.com/advisories/29125/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
XWine 1.x
http://secunia.com/product/17849/

DESCRIPTION:
Steve Kemp has reported two security issues in XWine, which can be
exploited by malicious, local users to perform certain actions with
escalated privileges.

1) The temporary file "/tmp/temporaire" is used in an insecure
manner. This can be exploited to e.g. truncate arbitrary files with
the privileges of a user running xwine via symlink attacks.

2) The application sets insecure permissions for the configuration
file "/etc/wine/config". This can potentially be exploited to execute
arbitrary commands with the privileges of a user running wine by e.g.
changing certain configuration settings.

The vulnerabilities are reported in 1.0.1-1.1. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Steve Kemp

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468050

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