The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4053 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4053-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Tobias Frost     February 15, 2025                             https://wiki.debian.org/LTS
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    Package        : freerdp2     Version        : 2.3.0+dfsg1-2+deb11u2     CVE ID         : CVE-2021-41160 CVE-2022-24883 CVE-2022-39282 CVE-2022-39283                      CVE-2022-39316 CVE-2022-39318 CVE-2022-39319 CVE-2022-39347                      CVE-2022-41877 CVE-2023-39350 CVE-2023-39351 CVE-2023-39352                      CVE-2023-39353 CVE-2023-39354 CVE-2023-39356 CVE-2023-40181                      CVE-2023-40186 CVE-2023-40188 CVE-2023-40567 CVE-2023-40569                      CVE-2023-40589 CVE-2024-22211 CVE-2024-32039 CVE-2024-32040                      CVE-2024-32458 CVE-2024-32459 CVE-2024-32460 CVE-2024-32658                      CVE-2024-32659 CVE-2024-32660 CVE-2024-32661     Debian Bug     : 1001062 1021659 1051638 1061173 1069728 1072112

    Multiple vulnerabilties have been found in freelrdp2, a free     implementation of the Remote Desktop Protocol (RDP). The vulnerabilties     potentially allows authentication bypasses on configuration errors,     buffer overreads, DoS vectors, buffer overflows or accessing files     outside of a shared directory.

    CVE-2021-41160

        In affected versions a malicious server might trigger out of bound         writes in a connected client. Connections using GDI or SurfaceCommands         to send graphics updates to the client might send `0` width/height or         out of bound rectangles to trigger out of bound writes. With `0` width         or heigth the memory allocation will be `0` but the missing bounds         checks allow writing to the pointer at this (not allocated) region.

    CVE-2022-24883

        Prior to version 2.7.0, server side authentication against a `SAM` file         might be successful for invalid credentials if the server has configured         an invalid `SAM` file path. FreeRDP based clients are not affected. RDP         server implementations using FreeRDP to authenticate against a `SAM`         file are affected. Version 2.7.0 contains a fix for this issue. As a         workaround, use custom authentication via `HashCallback` and/or ensure         the `SAM` database path configured is valid and the application has file         handles left.

    CVE-2022-39282

        FreeRDP based clients on unix systems using `/parallel` command line         switch might read uninitialized data and send it to the server the         client is currently connected to. FreeRDP based server implementations         are not affected.

    CVE-2023-39283

        All FreeRDP based clients when using the `/video` command line switch         might read uninitialized data, decode it as audio/video and display the         result.  FreeRDP based server implementations are not affected.

    CVE-2022-39316

        In affected versions there is an out of bound read in ZGFX decoder         component of FreeRDP. A malicious server can trick a FreeRDP based         client to read out of bound data and try to decode it likely resulting         in a crash.

    CVE-2022-39318

        Affected versions of FreeRDP are missing input validation in `urbdrc`         channel.  A malicious server can trick a FreeRDP based client to crash         with division by zero.

    CVE-2022-39319

        Affected versions of FreeRDP are missing input length validation in the         `urbdrc` channel. A malicious server can trick a FreeRDP based client to         read out of bound data and send it back to the server.

    CVE-2022-39347

        Affected versions of FreeRDP are missing path canonicalization and base         path check for `drive` channel. A malicious server can trick a FreeRDP         based client to read files outside the shared directory.

    CVE-2022-41877

        Affected versions of FreeRDP are missing input length validation in         `drive` channel. A malicious server can trick a FreeRDP based client to         read out of bound data and send it back to the server.

    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.

    CVE-2023-39351

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions of FreeRDP are         subject to a Null Pointer Dereference leading a crash in the RemoteFX         (rfx) handling. Inside the `rfx_process_message_tileset` function, the         program allocates tiles using `rfx_allocate_tiles` for the number of         numTiles. If the initialization process of tiles is not completed for         various reasons, tiles will have a NULL pointer. Which may be accessed         in further processing and would cause a program 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.

    CVE-2023-39352

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         invalid offset validation leading to Out Of Bound Write. This can be         triggered when the values `rect->left` and `rect->top` are exactly equal         to `surface->width` and `surface->height`. eg. `rect->left` ==         `surface->width` && `rect->top` == `surface->height`. In practice this         should cause 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.

    CVE-2023-39353

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to a         missing offset validation leading to Out Of Bound Read.  In the         `libfreerdp/codec/rfx.c` file there is no offset validation in         `tile->quantIdxY`, `tile->quantIdxCb`, and `tile->quantIdxCr`. As a         result crafted input can lead to an out of bounds read access which in         turn will cause 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.

    CVE-2023-39354

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         Out-Of-Bounds Read in the `nsc_rle_decompress_data` function. The         Out-Of-Bounds Read occurs because it processes `context->Planes` without         checking if it contains data of sufficient length. Should an attacker be         able to leverage this vulnerability they may be able to cause 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.

    CVE-2023-39355

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Versions of FreeRDP on the 3.x         release branch before beta3 are subject to a Use-After-Free in         processing `RDPGFX_CMDID_RESETGRAPHICS` packets. If         `context->maxPlaneSize` is 0, `context->planesBuffer` will be freed.
        However, without updating `context->planesBuffer`, this leads to a         Use-After-Free exploit vector. In most environments this should only         result in a crash. This issue has been addressed in version 3.0.0-beta3         and users of the beta 3.x releases are advised to upgrade. There are no         known workarounds for this vulnerability.

    CVE-2023-39356

        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.

    CVE-2023-40181

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         Integer-Underflow leading to Out-Of-Bound Read in the         `zgfx_decompress_segment` function. In the context of `CopyMemory`, it's         possible to read data beyond the transmitted packet range and likely         cause 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 issue.

    CVE-2023-40186

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         IntegerOverflow leading to Out-Of-Bound Write Vulnerability in the         `gdi_CreateSurface` function. This issue affects FreeRDP based clients         only. FreeRDP proxies are not affected as image decoding is not done by         a proxy. 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 issue.

    CVE-2023-40188

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         Out-Of-Bounds Read in the `general_LumaToYUV444` function. This         Out-Of-Bounds Read occurs because processing is done on the `in`         variable without checking if it contains data of sufficient length.
        Insufficient data for the `in` variable may cause errors or crashes.
        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 issue.

    CVE-2023-40567

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         Out-Of-Bounds Write in the `clear_decompress_bands_data` function in         which there is no offset validation. Abuse of this vulnerability may         lead to an out of bounds write. 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.

    CVE-2023-40569

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. Affected versions are subject to an         Out-Of-Bounds Write in the `progressive_decompress` function. This issue         is likely down to incorrect calculations of the `nXSrc` and `nYSrc`         variables. 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.

    CVE-2023-40589

        FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),         released under the Apache license. In affected versions there is a         Global-Buffer-Overflow in the ncrush_decompress function.  Feeding         crafted input into this function can trigger the overflow which has only         been shown to cause 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 issue.

    CVE-2024-22211

        FreeRDP is a set of free and open source remote desktop protocol library         and clients. In affected versions an integer overflow in         `freerdp_bitmap_planar_context_reset` leads to heap-buffer overflow.
        This affects FreeRDP based clients. FreeRDP based server implementations         and proxy are not affected. A malicious server could prepare a         `RDPGFX_RESET_GRAPHICS_PDU` to allocate too small buffers, possibly         triggering later out of bound read/write. Data extraction over network         is not possible, the buffers are used to display an image. This issue         has been addressed in version 2.11.5 and 3.2.0. Users are advised to         upgrade. there are no know workarounds for this vulnerability.

    CVE-2024-32039

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients using a version of FreeRDP prior to 3.5.0 or 2.11.6 are         vulnerable to integer overflow and out-of-bounds write. Versions 3.5.0         and 2.11.6 patch the issue. As a workaround, do not use `/gfx` options         (e.g. deactivate with `/bpp:32` or `/rfx` as it is on by default).

    CVE-2024-32040

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 and         have connections to servers using the `NSC` codec are vulnerable to         integer underflow. Versions 3.5.0 and 2.11.6 patch the issue. As a         workaround, do not use the NSC codec (e.g. use `-nsc`).

    CVE-2024-32458

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 are         vulnerable to out-of-bounds read. Versions 3.5.0 and 2.11.6 patch the         issue. As a workaround, use `/gfx` or `/rfx` modes (on by default,         require server side support).

    CVE-2024-32459

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients and servers that use a version of FreeRDP prior to 3.5.0         or 2.11.6 are vulnerable to out-of-bounds read. Versions 3.5.0 and         2.11.6 patch the issue. No known workarounds are available.

    CVE-2024-32460

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based based clients using `/bpp:32` legacy `GDI` drawing path with a         version of FreeRDP prior to 3.5.0 or 2.11.6 are vulnerable to         out-of-bounds read. Versions 3.5.0 and 2.11.6 patch the issue. As a         workaround, use modern drawing paths (e.g. `/rfx` or `/gfx` options).
        The workaround requires server side support.

    CVE-2024-32658

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients prior to version 3.5.1 are vulnerable to out-of-bounds         read. Version 3.5.1 contains a patch for the issue. No known workarounds         are available.

    CVE-2024-32659

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients prior to version 3.5.1 are vulnerable to out-of-bounds         read if `((nWidth == 0) and (nHeight == 0))`. Version 3.5.1 contains a         patch for the issue. No known workarounds are available.

    CVE-2024-32660

        FreeRDP is a free implementation of the Remote Desktop Protocol. Prior         to version 3.5.1, a malicious server can crash the FreeRDP client by         sending invalid huge allocation size. Version 3.5.1 contains a patch for         the issue. No known workarounds are available.

    CVE-2024-32661

        FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP         based clients prior to version 3.5.1 are vulnerable to a possible `NULL`         access and crash. Version 3.5.1 contains a patch for the issue. No known         workarounds are available.

    For Debian 11 bullseye, these problems have been fixed in version     2.3.0+dfsg1-2+deb11u2.

    We recommend that you upgrade your freerdp2 packages.

    For the detailed security status of freerdp2 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/freerdp2

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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