CVE-2019-11840

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    CVE-2019-11840

    Published: 9 May 2019Last Modified: 15 Mar 2026

    Summary:

    Details: An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications.

    References: https://groups.google.com/forum/#%21msg/golang-announce/tjyNcJxb2vQ/n0NRBziSCAAJ, https://pkg.go.dev/vuln/GO-2022-0209, https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html, https://github.com/golang/go/issues/30965, https://lists.debian.org/debian-lts-announce/2019/06/msg00029.html, https://lists.debian.org/debian-lts-announce/2020/11/msg00016.html, https://lists.debian.org/debian-lts-announce/2021/01/msg00015.html, https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html, https://lists.debian.org/debian-lts-announce/2020/11/msg00030.html, https://bugzilla.redhat.com/show_bug.cgi?id=1691529, https://go.googlesource.com/crypto/+/b7391e95e576cacdcdd422573063bc057239113d

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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