UBUNTU-CVE-2020-8244

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    UBUNTU-CVE-2020-8244

    Published: 30 Aug 2020Last Modified: 4 Feb 2026
    Upstream:
    CVE-2020-8244

    Summary:

    Details: A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.

    References: https://ubuntu.com/security/CVE-2020-8244, https://hackerone.com/reports/966347, https://github.com/rvagg/bl/commit/d3e240e3b8ba4048d3c76ef5fb9dd1f8872d3190, https://ubuntu.com/security/notices/USN-5098-1, https://ubuntu.com/security/notices/USN-5159-1, https://www.cve.org/CVERecord?id=CVE-2020-8244

    Affected packages

    Package

    Name: node-bl

    Purl: pkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.9.3-1ubuntu0.1~esm1

    Affected versions

    0.9.3-1

    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-2020-8244 | CVE-DB