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    CVE-2021-33500

    PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.

    Published:May 21, 2021
    Last Modified:Nov 21, 2024
    EPS:May 21, 2021
    EPSS Score:0.004
    CVSS Score:7.5

    Affected Products

    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Putty
    Product
    Putty

    Exploits

    https://docs.ssh-mitm.at/puttydos.htmlhttps://github.com/ssh-mitm/ssh-mitm-plugins/blob/main/ssh_mitm_plugins/ssh/putty_dos.pyhttps://docs.ssh-mitm.at/puttydos.htmlhttps://github.com/ssh-mitm/ssh-mitm-plugins/blob/main/ssh_mitm_plugins/ssh/putty_dos.py

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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