CVE-2015-8803

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    CVE-2015-8803

    Published: 23 Feb 2016Last Modified: 16 Apr 2026

    Summary:

    Details: The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8805.

    References: http://rhn.redhat.com/errata/RHSA-2016-2582.html, http://www.ubuntu.com/usn/USN-2897-1, https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html, https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html, https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d, http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.html, http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177229.html, http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177473.html, http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html, http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html, http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html, http://www.openwall.com/lists/oss-security/2016/02/02/2, http://www.openwall.com/lists/oss-security/2016/02/03/1, https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html

    Affected packages

    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