UBUNTU-CVE-2021-29923

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    UBUNTU-CVE-2021-29923

    Published: 7 Aug 2021Last Modified: 24 Oct 2025
    Upstream:
    CVE-2021-29923

    Summary:

    Details: Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation. This affects net.ParseIP and net.ParseCIDR.

    References: https://ubuntu.com/security/CVE-2021-29923, https://github.com/golang/go/issues/30999, https://github.com/golang/go/issues/43389, https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-016.md, https://go-review.googlesource.com/c/go/+/325829/, https://defcon.org/html/defcon-29/dc-29-speakers.html#kaoudis, https://golang.org/pkg/net/#ParseCIDR, https://www.cve.org/CVERecord?id=CVE-2021-29923

    Affected packages

    Package

    Name: golang-1.10

    Purl: pkg:deb/ubuntu/[email protected]~14.04.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.10.4-2ubuntu1~14.04.1

    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-2021-29923 | CVE-DB