UBUNTU-CVE-2017-9526

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    UBUNTU-CVE-2017-9526

    Published: 10 Jun 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-9526
    Aliases:
    USN-3347-1

    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://ubuntu.com/security/CVE-2017-9526, https://ubuntu.com/security/notices/USN-3347-1, https://www.cve.org/CVERecord?id=CVE-2017-9526

    Affected packages

    Package

    Name: libgcrypt20

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.6.5-2ubuntu0.3

    Affected versions

    1.6.3-2ubuntu1
    1.6.4-3
    1.6.4-4
    1.6.4-5
    1.6.5-2
    1.6.5-2ubuntu0.2

    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