* SITIC Vulnerability Advisory *
Advisory Name: Evolution multiple remote format string bugs
Advisory Reference: SA05-001
Date of initial release: 2005-08-10
Product: Evolution 1.5, 2.0, 2.1, 2.2, 2.3
Platform: Linux, BSD systems, Unix
Effect: Remote code execution
Vulnerability Identifier: Not assigned
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.
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
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.
Users that never use any of the vulnerable features in Evolution are not
o Evolution 1.5 to Evolution 184.108.40.206
We recommend that users either upgrade to Evolution 2.3.7 (unstable) or
apply our unofficial patch to their Evolution installation.
Evolution 2.3.7 is available from the following source:
Our unofficial patch is available from our home page:
These vulnerabilities were discovered by Ulf Harnhammar for SITIC, Swedish
IT Incident Centre.
obz, liquidx: please bump or apply proposed fix.
Pulling in the rest of the Gnome herd.
We're late on this one, please bump evolution with proposed patch or advise.
Heres the link to the patch for reference, its a tad difficult to find on the site.
patched, tested patch / compile, committed as:
Arches, please test evolution-2.2.3-r3 and mark stable, thanks.
Stable on SPARC.
Stable on hppa
This is CAN-2005-2550,
No, it's CAN-2005-2549 and CAN-2005-2550.
// Ulf Harnhammar
Hui, the VIPs are watching us :)
Thanks for the headsup!
Stable on amd64
Stable on the almighty alpha architecture !
Stable on ppc.
All security covered arches marked stable, should be ready for GLSA
Stable on ia64.
GLSA 200508-12. Thanks to everbody who helped.