UBUNTU-CVE-2015-7940

    Dashboard / Vulnerabilities / UBUNTU-CVE-2015-7940

    UBUNTU-CVE-2015-7940

    Published: 9 Nov 2015Last Modified: 4 Feb 2026
    Upstream:
    CVE-2015-7940
    Aliases:
    USN-3727-1

    Summary:

    Details: The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman (ECDH) key exchanges, aka an "invalid curve attack."

    References: https://ubuntu.com/security/CVE-2015-7940, https://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html, https://ubuntu.com/security/notices/USN-3727-1, https://www.cve.org/CVERecord?id=CVE-2015-7940

    Affected packages

    Package

    Name: bouncycastle

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-2ubuntu0.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.49+dfsg-2ubuntu0.1

    Affected versions

    1.48+dfsg-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
    UBUNTU-CVE-2015-7940 | CVE-DB