Advisory Published
Updated

CVE-2017-17689

First published: Wed May 16 2018(Updated: )

The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
9folders Nine
Apple Mail
Apple Mail
Bloop Airmail
Emclient Emclient
Flipdogsolutions Maildroid
Freron Mailmate
GNOME Evolution
Google Gmail
Horde Horde Imp
IBM Notes
KDE KMail
KDE Trojita
Microsoft Outlook=2007
Microsoft Outlook=2010
Microsoft Outlook=2013
Microsoft Outlook=2016
Mozilla Thunderbird
Postbox-inc Postbox
R2mail2 R2mail2
RITLabs The Bat

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Frequently Asked Questions

  • What is CVE-2017-17689?

    CVE-2017-17689 is a vulnerability in the S/MIME specification that allows a Cipher Block Chaining (CBC) malleability-gadget attack leading to plaintext exfiltration, also known as EFAIL.

  • Which software is affected by CVE-2017-17689?

    CVE-2017-17689 affects multiple software including 9folders Nine, Apple Mail, Bloop Airmail, Emclient Emclient, Flipdogsolutions Maildroid, Freron Mailmate, GNOME Evolution, Google Gmail, Horde Horde Imp, IBM Notes, KDE KMail, KDE Trojita, Microsoft Outlook (versions 2007, 2010, 2013, and 2016), Mozilla Thunderbird, Postbox-inc Postbox, R2mail2 R2mail2, and RITLabs The Bat.

  • What is the severity of CVE-2017-17689?

    CVE-2017-17689 has a severity rating of medium and a CVSS score of 5.9.

  • How can I mitigate the vulnerability CVE-2017-17689?

    To mitigate CVE-2017-17689, it is recommended to update the affected software to the latest version, where the vulnerability has been patched.

  • Where can I find more information about CVE-2017-17689?

    You can find more information about CVE-2017-17689 at the following references: [SecurityFocus](http://www.securityfocus.com/bid/104165), [EFAIL](https://efail.de), [Hacker News](https://news.ycombinator.com/item?id=17066419)

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