(Red Hat Issues Fix) Evolution Buffer Overflow in Replying to iCalendar Requests Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID: 1020173|
SecurityTracker URL: http://securitytracker.com/id/1020173
(Links to External Site)
Date: Jun 4 2008
Execution of arbitrary code via network, User access via network|
Fix Available: Yes Vendor Confirmed: Yes |
A vulnerability was reported in Evolution. A remote user can cause arbitrary code to be executed on the target user's system.|
A remote user can create an iCalendar request with a specially crafted 'DESCRIPTION' property. When the request is replied to by the target user when in calendar view, a buffer overflow will occur and arbitrary code will be executed on the target user's system. The code will run with the privileges of the target user.
The vendor was notified on May 27, 2008.
Alin Rad Pop of Secunia Research reported this vulnerability.
Discovered by Alin Rad Pop, Secunia Research.
The original advisory is available at:
A remote user can create a request that, when replied to by the target user, will execute arbitrary code on the target user's system.|
Red Hat has released a fix.|
The Red Hat advisory is available at:
Vendor URL: www.gnome.org/projects/evolution/ (Links to External Site)
|Underlying OS: Linux (Red Hat Enterprise)|
|Underlying OS Comments: 5|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2008:0514-01] Important: evolution security update|
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Red Hat Security Advisory
Synopsis: Important: evolution security update
Advisory ID: RHSA-2008:0514-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0514.html
Issue date: 2008-06-04
CVE Names: CVE-2008-1108 CVE-2008-1109
Updated evolution packages that fix two buffer overflow vulnerabilities are
now available for Red Hat Enterprise Linux 5.
This update has been rated as having important security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
RHEL Optional Productivity Applications (v. 5 server) - i386, x86_64
Evolution is the integrated collection of e-mail, calendaring, contact
management, communications and personal information management (PIM) tools
for the GNOME desktop environment.
A flaw was found in the way Evolution parsed iCalendar timezone attachment
data. If the Itip Formatter plug-in was disabled and a user opened a mail
with a carefully crafted iCalendar attachment, arbitrary code could be
executed as the user running Evolution. (CVE-2008-1108)
Note: the Itip Formatter plug-in, which allows calendar information
(attachments with a MIME type of "text/calendar") to be displayed as part
of the e-mail message, is enabled by default.
A heap-based buffer overflow flaw was found in the way Evolution parsed
iCalendar attachments with an overly long "DESCRIPTION" property string. If
a user responded to a carefully crafted iCalendar attachment in a
particular way, arbitrary code could be executed as the user running
The particular response required to trigger this vulnerability was as
1. Receive the carefully crafted iCalendar attachment.
2. Accept the associated meeting.
3. Open the calender the meeting was in.
4. Reply to the sender.
Red Hat would like to thank Alin Rad Pop of Secunia Research for
responsibly disclosing these issues.
All Evolution users should upgrade to these updated packages, which contain
backported patches which resolves these issues.
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
448540 - CVE-2008-1108 evolution: iCalendar buffer overflow via large timezone specification
448541 - CVE-2008-1109 evolution: iCalendar buffer overflow via large description parameter
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
RHEL Desktop Workstation (v. 5 client):
RHEL Optional Productivity Applications (v. 5 server):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2008 Red Hat, Inc.
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