GO-2021-0239

    Dashboard / Vulnerabilities / GO-2021-0239

    GO-2021-0239

    Published: 17 Feb 2022Last Modified: 20 May 2024

    Summary: Improper sanitization when resolving values from DNS in net

    Details: The LookupCNAME, LookupSRV, LookupMX, LookupNS, and LookupAddr functions and their respective methods on the Resolver type may return arbitrary values retrieved from DNS which do not follow the established RFC 1035 rules for domain names. If these names are used without further sanitization, for instance unsafely included in HTML, they may allow for injection of unexpected content. Note that LookupTXT may still return arbitrary values that could require sanitization before further use.

    References: https://go.dev/cl/320949, https://go.googlesource.com/go/+/c89f1224a544cde464fcb86e78ebb0cc97eedba2, https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI, https://go.dev/issue/46241

    Affected packages

    Package

    Name: stdlib

    Purl: pkg:golang/stdlib

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.15.13

    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
    GO-2021-0239 | CVE-DB