[UNIX] Evolution Multiple Format String Vulnerabilites

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html 

- - - - - - - - -



  Evolution Multiple Format String Vulnerabilites
------------------------------------------------------------------------


SUMMARY

Evolution suffers from several format string bugs when handling data from 
remote sources. These bugs lead to crashes or the execution of arbitrary 
assembly language code.

DETAILS

Vulnerable Systems:
 * Evolution version 1.5
 * Evolution version 2.0
 * Evolution version 2.1
 * Evolution version 2.2
 * Evolution version 2.3

Immune Systems:
 * Evolution version 2.3.7 or newer

1) The first format string bug occurs when viewing the full vCard data 
attached to an e-mail message.

When opening an e-mail message, only a compact view of some of the fields 
from the vCard is displayed, and this does not trigger the vulnerability. 
To be affected, the user must click on Show Full vCard or perform similar 
actions such as clicking on Save in Addressbook and then viewing the saved 
data under the Contacts tab.

Why is this important? An attacker might notice that an organisation uses 
Evolution, for instance after seeing the "X-Mailer: Evolution x.y.z" 
e-mail header in their e-mails. He or she could then send out e-mail 
messages with malicious vCards to many e-mail accounts at the 
organisation, in the hope that some of the recipients will view the full 
vCard data sooner or later, thus exposing the organisation to this format 
string bug.

2) The second format string bug occurs when displaying contact data from 
remote LDAP servers.

3) The third format string bug occurs when displaying task list data from 
remote servers.

4) The fourth, and least serious, format string bug occurs when the user 
goes to the Calendars tab to save task list data that is vulnerable to 
problem 3 above. Other calendar entries that do not come from task lists 
are also affected.

Mitigating factors:
 * Users that never use any of the vulnerable features in Evolution are 
not affected.

Recommendations:
We recommend that users either upgrade to Evolution 2.3.7 (unstable) or 
apply our unofficial patch to their Evolution installation.

Patch information:
Evolution 2.3.7 is available from the following source:  
<http://ftp.gnome.org/pub/gnome/sources/evolution/> 
http://ftp.gnome.org/pub/gnome/sources/evolution/

Our unofficial patch is available from the following page:  
<http://www.sitic.se> http://www.sitic.se


ADDITIONAL INFORMATION

The information has been provided by  <mailto:[email protected]> SITIC 
Vulnerability Advisory.



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


This bulletin is sent to members of the SecuriTeam mailing list. 
To unsubscribe from the list, send mail with an empty subject line and body to: [email protected] 
In order to subscribe to the mailing list, simply forward this email to: [email protected] 


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

DISCLAIMER: 
The information in this bulletin is provided "AS IS" without warranty of any kind. 
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.