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    CVE-2023-39350

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. This issue affects Clients only. Integer underflow leading to DOS (e.g. abort due to `WINPR_ASSERT` with default compilation flags). When an insufficient blockLen is provided, and proper length validation is not performed, an Integer Underflow occurs, leading to a Denial of Service (DOS) vulnerability. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

    Published:Aug 31, 2023
    Last Modified:Nov 3, 2025
    EPS:Aug 31, 2023
    EPSS Score:0.00308
    CVSS Score:5.9

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Freerdp
    Product
    Freerdp
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rrrv-3w42-pffhhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rrrv-3w42-pffh

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://github.com/FreeRDP/FreeRDP/commit/e204fc8be5a372626b13f66daf2abafe71dbc2dc
    https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rrrv-3w42-pffh
    https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
    https://lists.fedoraproject.org/archives/list/[email protected]/message/A6LLDAPEXRDJOM3PREDDD267SSNT77DP/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/IHMTGKCZXJPQOR5ZD2I4GPDNP2DKRXMF/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/OH2ATH2BKDNKCJAU4WPPXK4SHLE3UJUV/
    https://security.gentoo.org/glsa/202401-16
    https://github.com/FreeRDP/FreeRDP/commit/e204fc8be5a372626b13f66daf2abafe71dbc2dc
    https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rrrv-3w42-pffh
    https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
    https://lists.debian.org/debian-lts-announce/2025/02/msg00016.html
    https://lists.fedoraproject.org/archives/list/[email protected]/message/A6LLDAPEXRDJOM3PREDDD267SSNT77DP/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/IHMTGKCZXJPQOR5ZD2I4GPDNP2DKRXMF/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/OH2ATH2BKDNKCJAU4WPPXK4SHLE3UJUV/
    https://security.gentoo.org/glsa/202401-16

    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