CVE-2020-21048

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    CVE-2020-21048

    Published: 14 Sept 2021Last Modified: 8 Jul 2026

    Summary:

    Details: An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file.

    References: https://github.com/saitoha/libsixel/blob/master/ChangeLog, https://github.com/saitoha/libsixel/releases/tag/v1.8.4, https://bitbucket.org/netbsd/pkgsrc/commits/6f0c011cbfccdffa635d04c84433b1a02687adad, https://github.com/saitoha/libsixel/commit/cb373ab6614c910407c5e5a93ab935144e62b037, https://github.com/saitoha/libsixel/issues/73

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -686d234ae20f97b9d816d4147ba3f4b90dbae72e

    Affected versions

    v1.8.3
    v1.8.2
    v1.8.1
    v1.8.0

    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
    CVE-2020-21048 | CVE-DB