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    CVE-2013-4207

    Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.

    Published:Aug 19, 2013
    Last Modified:Apr 11, 2025
    EPS:Aug 19, 2013
    EPSS Score:0.00579
    CVSS Score:4.3

    Affected Products

    Vendor
    Putty
    Product
    Putty
    Vendor
    Simon Tatham
    Product
    Putty

    Exploits

    No exploit reference

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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