Serious vulnerabilities with OpenPGP and S/MIME

Post Syndicated from corbet original https://lwn.net/Articles/754370/rss

The efail.de site describes a set of
vulnerabilities in the implementation of PGP and MIME that can cause the
disclosure of encrypted communications, including old messages. “In a
nutshell, EFAIL abuses active content of HTML emails, for example
externally loaded images or styles, to exfiltrate plaintext through
requested URLs.

The EFF recommends
uninstalling email-encryption tools that automatically
decrypt email entirely. “Until the flaws
described in the paper are more widely understood and fixed, users should
arrange for the use of alternative end-to-end secure channels, such as
Signal, and temporarily stop sending and especially reading PGP-encrypted
email.