CVE-2017-17688

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    CVE-2017-17688

    Published: 16 May 2018Last Modified: 15 Mar 2026

    Summary:

    Details: 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

    References: http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html, http://www.securitytracker.com/id/1040904, https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html, https://twitter.com/matthew_d_green/status/995996706457243648, https://www.synology.com/support/security/Synology_SA_18_22, http://www.securityfocus.com/bid/104162, https://news.ycombinator.com/item?id=17066419, https://protonmail.com/blog/pgp-vulnerability-efail, https://www.patreon.com/posts/cybersecurity-15-18814817, https://efail.de

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High