UBUNTU-CVE-2018-12520

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    UBUNTU-CVE-2018-12520

    Published: 5 Jul 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-12520
    Aliases:
    USN-4842-1

    Summary:

    Details: An issue was discovered in ntopng 3.4 before 3.4.180617. The PRNG involved in the generation of session IDs is not seeded at program startup. This results in deterministic session IDs being allocated for active user sessions. An attacker with foreknowledge of the operating system and standard library in use by the host running the service and the username of the user whose session they're targeting can abuse the deterministic random number generation in order to hijack the user's session, thus escalating their access.

    References: https://ubuntu.com/security/CVE-2018-12520, http://seclists.org/fulldisclosure/2018/Jul/14, https://gist.github.com/Psychotropos/3e8c047cada9b1fb716e6a014a428b7f, https://github.com/ntop/ntopng/commit/30610bda60cbfc058f90a1c0a17d0e8f4516221a, https://ubuntu.com/security/notices/USN-4842-1, https://www.cve.org/CVERecord?id=CVE-2018-12520

    Affected packages

    Package

    Name: ntopng

    Purl: pkg:deb/ubuntu/[email protected]+dfsg1-1ubuntu0.1~esm2?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.2+dfsg1-1ubuntu0.1~esm2

    Affected versions

    1.2.1+dfsg1-2ubuntu1

    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