8.8
CWE
787 119
Advisory Published
Updated

CVE-2020-21548: Buffer Overflow

First published: Fri Sep 17 2021(Updated: )

Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Libsixel Project Libsixel=1.8.3

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Frequently Asked Questions

  • What is CVE-2020-21548?

    CVE-2020-21548 is a vulnerability in Libsixel 1.8.3 that allows a heap-based buffer overflow.

  • How severe is CVE-2020-21548?

    CVE-2020-21548 has a severity rating of 8.8 (high).

  • What software is affected by CVE-2020-21548?

    Libsixel 1.8.3 is affected by CVE-2020-21548.

  • What is the CWE of CVE-2020-21548?

    CVE-2020-21548 belongs to CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-787 (Out-of-bounds Write).

  • How can I fix CVE-2020-21548?

    Update Libsixel to a version that is not affected by CVE-2020-21548.

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