CVE-2017-9526

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    CVE-2017-9526

    Published: 11 Jun 2017Last Modified: 8 Jul 2026

    Summary:

    Details: In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.

    References: https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=5a22de904a0a366ae79f03ff1e13a1232a89e26b, https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=f9494b3f258e01b6af8bd3941ce436bcc00afc56, http://www.debian.org/security/2017/dsa-3880, http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html, http://www.securityfocus.com/bid/99046, https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html, https://bugzilla.suse.com/show_bug.cgi?id=1042326

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    libgcrypt-1.7.6
    libgcrypt-1.7.5
    libgcrypt-1.7.4
    libgcrypt-1.7.3
    libgcrypt-1.7.2
    libgcrypt-1.7.1
    libgcrypt-1.7.0

    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