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TITLE:
Evolution Shared Memo Categories Format String Vulnerability

SECUNIA ADVISORY ID:
SA24234

VERIFY ADVISORY:
http://secunia.com/advisories/24234/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
GNOME Evolution 2.x
http://secunia.com/product/5525/
Novell Evolution 2.x
http://secunia.com/product/4558/

DESCRIPTION:
Secunia Research has discovered a vulnerability in Evolution, which
potentially can be exploited by malicious people to 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.

The vulnerability is confirmed in version 2.8.2.1. Other versions may
also be affected.

SOLUTION:
Do not open untrusted shared memos.

Various Linux vendors will issue patched versions soon.

PROVIDED AND/OR DISCOVERED BY:
Ulf Harnhammar, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2007-44/

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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