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Arrow  Topic :

Local vulnerability in WeFi Client v3.2.1.4.1(Update)


Arrow  SecurityAlert : 3987
Arrow  CVE : CVE-2008-3147
Arrow  CWE : CWE-200
Arrow  SecurityRisk : Medium  Security Risk Medium  (About)
Arrow  Remote Exploit : No
Arrow  Local Exploit : Yes
Arrow  Victim interaction required : No
Arrow  Exploit Available : Yes
Arrow  Credit : XiaShing
Arrow  Published : 14.07.2008

Arrow  Affected Software : Wefi, Wefi, 3.2.1.4.1



Arrow  Advisory Content :  

==================================================

INFO

==================================================

The wireless client, WeFi v3.2.1.4.1 is susceptible to local
vulnerabilities due to improper coding. Earlier versions may

also be affected.

==================================================

DISCUSSION

==================================================

Due to lack of improper encryption and the client storing backups of the
log files, a local attacker can gain unencrypted keys to WEP, WPA and WPA2
access points. The log files that keep the keys are as follows:

C:\Program Files\WeFi\LogFiles\ClientWeFiLog.dat

C:\Program Files\WeFi\LogFiles\ClientWeFiLog.bak

C:\Program Files\WeFi\Users\mee (at) sheep.com (dot) inf [email concealed]
(Yet to be confirmed, heavily encrypted)

==================================================

SAMPLE

==================================================

Here is a sample of the backup file code:

a11ae90c2b66|7a000b|6|c8e|736|3f2a|ffffffff|0|0|35|6570|Create Profile|

a11ae90c2d4a|7a000b|6|c8e|736|3f2a|ffffffff|0|0|35|6571|try to connect|

a11ae90c2d4a|7a000b|6|c8e|736|3f2a|ffffffff|0|0|35|6572|09F82980CX|

As you can see, the key has been stored in plain text at the end of the
last line.

==================================================

NOTES

==================================================

It is to be noted that the backup file, .bak, is still viewable even after
the client is closed. When the .dat file exceeds 3000kb, it moves the data
to the .bak file and subsequently when that file exceeds 3000kb, the data
is deleted. This can exceed over a day of normal internet browsing.

The .dat file shows the unencrypted keys several lines after the phrase,
"Create Profile". It also shows failed attempts at connecting to a wireless
access point.

==================================================

SOLUTION

==================================================

Use heavier encryption or do not keep log files.

The vendor has been notified.

==================================================

Thanks,

Xia Shing Zee



Arrow  References :

http://xforce.iss.net/xforce/xfdb/43621
http://www.securityfocus.com/bid/30088
http://www.securityfocus.com/archive/1/archive/1/494026/100/0/threaded
http://www.securityfocus.com/archive/1/archive/1/493946/100/0/threaded
http://secunia.com/advisories/30966




Arrow  Feedback :

If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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