The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget...
Vulnerability Description
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
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://protonmail.com/blog/pgp-vulnerability-efail
- https://news.ycombinator.com/item?id=17066419
- https://www.patreon.com/posts/cybersecurity-15-18814817
- http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html
- http://www.securityfocus.com/bid/104162
- https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html
- https://efail.de
- https://twitter.com/matthew_d_green/status/995996706457243648
- https://www.synology.com/support/security/Synology_SA_18_22
- http://www.securitytracker.com/id/1040904
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Timeline
CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.