The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Apple | - (including) | - (including) | |
| Airmail | Bloop | - (including) | - (including) |
| Emclient | Emclient | - (including) | - (including) |
| Maildroid | Flipdogsolutions | - (including) | - (including) |
| Mailmate | Freron | - (including) | - (including) |
| Horde_imp | Horde | - (including) | - (including) |
| Outlook | Microsoft | 2007 (including) | 2007 (including) |
| Thunderbird | Mozilla | - (including) | - (including) |
| Postbox | Postbox-inc | - (including) | - (including) |
| R2mail2 | R2mail2 | - (including) | - (including) |
| Webmail | Roundcube | - (including) | - (including) |
| Enigmail | Ubuntu | artful | * |
| Enigmail | Ubuntu | trusty | * |
| Enigmail | Ubuntu | upstream | * |
References
- http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html
- http://www.securityfocus.com/bid/104162
- http://www.securitytracker.com/id/1040904
- https://efail.de
- https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html
- https://news.ycombinator.com/item?id=17066419
- https://protonmail.com/blog/pgp-vulnerability-efail
- https://twitter.com/matthew_d_green/status/995996706457243648
- https://www.patreon.com/posts/cybersecurity-15-18814817
- https://www.synology.com/support/security/Synology_SA_18_22
- http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html
- http://www.securityfocus.com/bid/104162
- http://www.securitytracker.com/id/1040904
- https://efail.de
- https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html
- https://news.ycombinator.com/item?id=17066419
- https://protonmail.com/blog/pgp-vulnerability-efail
- https://twitter.com/matthew_d_green/status/995996706457243648
- https://www.patreon.com/posts/cybersecurity-15-18814817
- https://www.synology.com/support/security/Synology_SA_18_22