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    CVE-2021-40839

    The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.

    Published:Sep 10, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 10, 2021
    EPSS Score:0.13839
    CVSS Score:7.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Rencode Project
    Product
    Rencode

    Exploits

    https://github.com/itlabbet/CVE-2021-40839

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://github.com/aresch/rencode/commit/572ff74586d9b1daab904c6f7f7009ce0143bb75
    https://github.com/aresch/rencode/pull/29
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMVQRPDVSVZNGGX57CFKCYT3DEYO4QB6/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MCLETLGVM5DBX6QNHQFW6TWGO5T3DENY/
    https://pypi.org/project/rencode/#history
    https://seclists.org/fulldisclosure/2021/Sep/16
    https://security.netapp.com/advisory/ntap-20211008-0001/
    https://github.com/aresch/rencode/commit/572ff74586d9b1daab904c6f7f7009ce0143bb75
    https://github.com/aresch/rencode/pull/29
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMVQRPDVSVZNGGX57CFKCYT3DEYO4QB6/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MCLETLGVM5DBX6QNHQFW6TWGO5T3DENY/
    https://pypi.org/project/rencode/#history
    https://seclists.org/fulldisclosure/2021/Sep/16
    https://security.netapp.com/advisory/ntap-20211008-0001/

    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