GHSA-562c-5r94-xh97

    Dashboard / Vulnerabilities / GHSA-562c-5r94-xh97

    GHSA-562c-5r94-xh97

    Published: 23 Aug 2018Last Modified: 21 Feb 2025

    Summary: Flask is vulnerable to Denial of Service via incorrect encoding of JSON data

    Details: The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3.

    References: https://nvd.nist.gov/vuln/detail/CVE-2018-1000656, https://github.com/pallets/flask/pull/2691, https://github.com/pallets/flask/commit/b178e89e4456e777b1a7ac6d7199052d0dfdbbbe, https://github.com/advisories/GHSA-562c-5r94-xh97, https://github.com/pallets/flask, https://github.com/pallets/flask/releases/tag/0.12.3, https://github.com/pypa/advisory-database/tree/main/vulns/flask/PYSEC-2018-66.yaml, https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html, https://security.netapp.com/advisory/ntap-20190221-0001, https://usn.ubuntu.com/4378-1

    Affected packages

    Package

    Name: flask

    Purl: pkg:pypi/flask

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.12.3

    Affected versions

    0.1

    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