CVE-2023-39356

    Dashboard / Vulnerabilities / CVE-2023-39356

    CVE-2023-39356

    Published: 31 Aug 2023Last Modified: 12 Aug 2026

    Summary: Missing offset validation leading to Out-of-Bounds Read in FreeRDP

    Details: FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a missing offset validation may lead to an Out Of Bound Read in the function `gdi_multi_opaque_rect`. In particular there is no code to validate if the value `multi_opaque_rect->numRectangles` is less than 45. Looping through `multi_opaque_rect->`numRectangles without proper boundary checks can lead to Out-of-Bounds Read errors which will likely lead to a crash. 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.

    References: https://github.com/FreeRDP/FreeRDP/blob/63a2f65618748c12f79ff7450d46c6e194f2db76/include/freerdp/primary.h#L186-L196, https://github.com/FreeRDP/FreeRDP/blob/63a2f65618748c12f79ff7450d46c6e194f2db76/libfreerdp/core/orders.c#L1503-L1504, https://github.com/FreeRDP/FreeRDP/blob/63a2f65618748c12f79ff7450d46c6e194f2db76/libfreerdp/gdi/gdi.c#L723C1-L758, 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://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39356.json, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q5v5-qhj5-mh6m, https://nvd.nist.gov/vuln/detail/CVE-2023-39356, https://security.gentoo.org/glsa/202401-16

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -1384b3c33b9bd7599633cc54bf20cf20ec6be83c

    Affected versions

    3.0.0-beta1
    3.0.0-beta2

    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
    CVE-2023-39356 | CVE-DB