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    CVE-2024-27354

    An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate containing an extremely large prime to cause a denial of service (CPU consumption for an isPrime primality check). NOTE: this issue was introduced when attempting to fix CVE-2023-27560.

    Published:Mar 1, 2024
    Last Modified:Sep 15, 2025
    EPS:Mar 1, 2024
    EPSS Score:0.00129
    CVSS Score:7.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Phpseclib
    Product
    1x
    Vendor
    Phpseclib
    Product
    2x
    Vendor
    Phpseclib
    Product
    3x
    Vendor
    Phpseclib
    Product
    Phpseclib

    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