UBUNTU-CVE-2020-11612

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    UBUNTU-CVE-2020-11612

    Published: 7 Apr 2020Last Modified: 8 Jun 2026
    Upstream:
    CVE-2020-11612

    Summary:

    Details: The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.

    References: https://ubuntu.com/security/CVE-2020-11612, https://github.com/netty/netty/issues/6168, https://github.com/netty/netty/pull/9924, https://github.com/netty/netty/commit/1543218d3e7afcb33a90b728b14370395a3deca0, https://github.com/netty/netty/compare/netty-4.1.45.Final...netty-4.1.46.Final, https://lists.apache.org/thread.html/r14446ed58208cb6d97b6faa6ebf145f1cf2c70c0886c0c133f4d3b6f@%3Ccommits.druid.apache.org%3E, https://lists.apache.org/thread.html/r2958e4d49ee046e1e561e44fdc114a0d2285927501880f15852a9b53@%3Ccommits.druid.apache.org%3E, https://lists.apache.org/thread.html/r3195127e46c87a680b5d1d3733470f83b886bfd3b890c50df718bed1@%3Ccommits.druid.apache.org%3E, https://lists.apache.org/thread.html/r7836bbdbe95c99d4d725199f0c169927d4e87ba57e4beeeb699c097a@%3Ccommits.druid.apache.org%3E, https://lists.apache.org/thread.html/r8a654f11e1172b0effbfd6f8d5b6ca651ae4ac724a976923c268a42f@%3Ccommits.druid.apache.org%3E, https://lists.apache.org/thread.html/ra98e3a8541a09271f96478d5e22c7e3bd1afdf48641c8be25d62d9f9@%3Ccommits.druid.apache.org%3E, https://ubuntu.com/security/notices/USN-4600-2, https://ubuntu.com/security/notices/USN-6049-1, https://www.cve.org/CVERecord?id=CVE-2020-11612

    Affected packages

    Package

    Name: netty

    Purl: pkg:deb/ubuntu/netty?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1:3.2.6.Final-2
    1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1
    1:3.2.6.Final-2+deb8u2ubuntu0.1~esm1

    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-2020-11612 | CVE-DB