Secunia Research: Evolution iCalendar "DESCRIPTION" Property Buffer Overflow

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                     Secunia Research 04/06/2008

    - Evolution iCalendar "DESCRIPTION" Property Buffer Overflow -

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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

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1) Affected Software

* Evolution 2.22.1

NOTE: Other versions may also be affected.

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2) Severity

Rating: Less Critical
Impact: System compromise
Where:  Remote

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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/

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4) Description of Vulnerability

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

The vulnerability is caused due to a boundary error when replying to
an iCalendar request while in calendar view. This can be exploited to
cause a heap-based buffer overflow via an overly long "DESCRIPTION"
property included in an iCalendar attachment.

Successful exploitation allows execution of arbitrary code, but
requires that the user accepts the iCalendar request and replies
to it from the "Calendars" window.

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5) Solution

Do not select untrusted e-mail messages.

Various Linux vendors will issue patched versions soon.

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6) Time Table

27/05/2008: vendor-sec notified.
27/05/2008: vendor-sec response.
04/06/2008: Public disclosure.

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7) Credits

Discovered by Alin Rad Pop, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2008-1109 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
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Secunia also provides a publicly accessible and comprehensive advisory
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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-23/

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

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