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Arrow  Topic :

Pidgin 2.4.1 Vulnerability


Arrow  SecurityAlert : 3966
Arrow  CVE : CVE-2008-2955
Arrow  CWE : CWE-20
Arrow  SecurityRisk : Low  Security Risk Low  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Victim interaction required : Yes
Arrow  Exploit Available : Yes
Arrow  Credit : Juan Pablo Lopez Yacubian
Arrow  Published : 03.07.2008

Arrow  Affected Software : Pidgin, Pidgin, 2.4.1



Arrow  Advisory Content :  


Application: Pidgin 2.4.1

OS: Linux - Ubuntu 8.04

------------------------------------------------------

1 - Description

2 - Vulnerability

3 - POC/EXPLOIT

------------------------------------------------------

Description

Pidgin is an instant messaging program with which you can use a number of
protocols known as (MSN, ICQ, AIM).

While there is Pidgin 2.4.2 version which was not provided in this version
so I could not say whether it was also vulnerable.

------------------------------------------------------

Vulnerability

The vulnerability works sending files with the protocol msn (I did not test
at all protocols),

if a file is sent with a long name and special characters and this causes
the program to break.

If we analyze the vulnerability with a debugger you can see a flaw in the
following function

0xb62abaeb in msn_slplink_process_msg

According with the characters used, the fault may vary in other functions.

------------------------------------------------------

POC/EXPLOIT

For proof of the concept you should create a file either (never mind the
extension) with the maximum allowable characters,

with the following characteristics.

ASCII = (‣ ․ ‥ ? )

HEX = ( 26 23 38 32 32 37 3b 20 26 23 38 32 32 38 3b 20 26 23 38 32 32 39
3b 20 85 )

------------------------------------------------------

Juan Pablo Lopez Yacubian



Arrow  References :

http://www.securityfocus.com/archive/1/archive/1/493682/100/0/threaded
http://www.frsirt.com/english/advisories/2008/1947
http://secunia.com/advisories/30881




Arrow  Feedback :

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