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Category:   Application (E-mail Client)  >   GNOME Evolution Vendors:   Gnome Development Team
GNOME Evolution Shared Memo Format String Bug Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017808
SecurityTracker URL:  http://securitytracker.com/id/1017808
CVE Reference:   CVE-2007-1002   (Links to External Site)
Date:  Mar 22 2007
Impact:   Execution of arbitrary code via network, User access via network

Version(s): 2.8.2.1, possibly other versions
Description:   A vulnerability was reported in GNOME Evolution. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted shared memo that, when accepted and viewed by the target user, will trigger a format string flaw in the write_html() function in 'calendar/gui/e-cal-component-memo-preview.c' and execute arbitrary code on the target user's system. The code will run with the privileges of the target user.

The vendor was notified on March 1, 2007.

Ulf Harnhammar of Secunia Research discovered this vulnerability.

Impact:   A remote user can create a shared memo that, when accepted and viewed by the target user, will execute arbitrary code on the target user's system.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.gnome.org/projects/evolution/ (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 3 2007 (Red Hat Issues Fix) GNOME Evolution Shared Memo Format String Bug Lets Remote Users Execute Arbitrary Code
Red Hat has released a fix for Red Hat Enterprise Linux 5.



 Source Message Contents

Subject:  [Full-disclosure] Secunia Research: Evolution Shared Memo

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

                     Secunia Research 21/03/2007

   - Evolution Shared Memo Categories Format String Vulnerability -

====================================================================== 
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

====================================================================== 
1) Affected Software 

Evolution 2.8.2.1

NOTE: Other versions may also be affected.

====================================================================== 
2) Severity 

Rating: Moderately Critical
Impact: System access
        DoS
Where:  Remote

====================================================================== 
3) Vendor's Description of Software 

"Evolution provides integrated mail, addressbook and calendaring
functionality to users of the GNOME desktop."

Product Link:
http://www.gnome.org/projects/evolution/

====================================================================== 
4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Evolution, which
can be exploited by malicious people to potentially compromise a 
vulnerable system.

A format string error in the "write_html()" function in calendar/gui/
e-cal-component-memo-preview.c when displaying a memo's categories 
can potentially be exploited to execute arbitrary code via a specially
crafted shared memo containing format specifiers.

Successful exploitation requires that the user opens a shared memo in
their mailbox, clicks on "Accept", and views the memo under the "Memo"
tab.

NOTE: The categories are not displayed in the mailbox view of a shared
memo.

====================================================================== 
5) Solution 

Do not open untrusted shared memos.

Various Linux vendors will issue patched versions soon.

====================================================================== 
6) Time Table 

01/03/2007 - Vendor notified (Red Hat and the vendor-sec list).
03/03/2007 - Vendor response.
21/03/2007 - Public disclosure.

====================================================================== 
7) Credits 

Discovered by Ulf Harnhammar, Secunia Research.

====================================================================== 
8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2007-1002 for the vulnerability.

====================================================================== 
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below to
see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

====================================================================== 
10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-44/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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



_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

 
 


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