RHEL 7 : freerdp (Unpatched Vulnerability)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory freerdp. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(195721);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/11");

  script_cve_id(
    "CVE-2017-2834",
    "CVE-2017-2835",
    "CVE-2017-2836",
    "CVE-2017-2837",
    "CVE-2017-2838",
    "CVE-2017-2839",
    "CVE-2020-4030",
    "CVE-2020-11097",
    "CVE-2020-15103",
    "CVE-2022-39282",
    "CVE-2022-39283",
    "CVE-2022-39316",
    "CVE-2022-39317",
    "CVE-2022-39318",
    "CVE-2022-39319",
    "CVE-2022-39320",
    "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-2024-32041",
    "CVE-2024-32458",
    "CVE-2024-32459",
    "CVE-2024-32460",
    "CVE-2024-32658",
    "CVE-2024-32659",
    "CVE-2024-32660",
    "CVE-2024-32661",
    "CVE-2024-32662"
  );

  script_name(english:"RHEL 7 : freerdp (Unpatched Vulnerability)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat 7 host is affected by multiple vulnerabilities that will not be patched.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple
vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - freerdp: Out-of-bounds write in rdp_recv_tpkt_pdu (CVE-2017-2835)

  - freerdp: Integer Overflow leading to Heap Overflow in freerdp_bitmap_planar_context_reset (CVE-2024-22211)

  - An exploitable code execution vulnerability exists in the authentication functionality of FreeRDP
    2.0.0-beta1+android11. A specially crafted server response can cause an out-of-bounds write resulting in
    an exploitable condition. An attacker can compromise the server or use a man in the middle attack to
    trigger this vulnerability. (CVE-2017-2834)

  - An exploitable denial of service vulnerability exists within the reading of proprietary server
    certificates in FreeRDP 2.0.0-beta1+android11. A specially crafted challenge packet can cause the program
    termination leading to a denial of service condition. An attacker can compromise the server or use man in
    the middle to trigger this vulnerability. (CVE-2017-2836)

  - An exploitable denial of service vulnerability exists within the handling of security data in FreeRDP
    2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a
    denial of service condition. An attacker can compromise the server or use man in the middle to trigger
    this vulnerability. (CVE-2017-2837)

  - An exploitable denial of service vulnerability exists within the handling of challenge packets in FreeRDP
    2.0.0-beta1+android11. A specially crafted challenge packet can cause the program termination leading to a
    denial of service condition. An attacker can compromise the server or use man in the middle to trigger
    this vulnerability. (CVE-2017-2838, CVE-2017-2839)

  - In FreeRDP before version 2.1.2, an out of bounds read occurs resulting in accessing a memory location
    that is outside of the boundaries of the static array PRIMARY_DRAWING_ORDER_FIELD_BYTES. This is fixed in
    version 2.1.2. (CVE-2020-11097)

  - In FreeRDP less than or equal to 2.1.2, an integer overflow exists due to missing input sanitation in
    rdpegfx channel. All FreeRDP clients are affected. The input rectangles from the server are not checked
    against local surface coordinates and blindly accepted. A malicious server can send data that will crash
    the client later on (invalid length arguments to a `memcpy`) This has been fixed in 2.2.0. As a
    workaround, stop using command line arguments /gfx, /gfx-h264 and /network:auto (CVE-2020-15103)

  - In FreeRDP before version 2.1.2, there is an out of bounds read in TrioParse. Logging might bypass string
    length checks due to an integer overflow. This is fixed in version 2.1.2. (CVE-2020-4030)

  - FreeRDP is a free remote desktop protocol library and clients. 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. Please upgrade to 2.8.1
    where this issue is patched. If unable to upgrade, do not use parallel port redirection (`/parallel`
    command line switch) as a workaround. (CVE-2022-39282)

  - FreeRDP is a free remote desktop protocol library and clients. 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. This issue has been patched in version
    2.8.1. If you cannot upgrade do not use the `/video` switch. (CVE-2022-39283)

  - FreeRDP is a free remote desktop protocol library and clients. 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. This issue has been addressed in
    the 2.9.0 release. Users are advised to upgrade. (CVE-2022-39316)

  - FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing a
    range check for input offset index in ZGFX decoder. A malicious server can trick a FreeRDP based client to
    read out of bound data and try to decode it. This issue has been addressed in version 2.9.0. There are no
    known workarounds for this issue. (CVE-2022-39317)

  - FreeRDP is a free remote desktop protocol library and clients. 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. This issue has been addressed in version 2.9.0. All users are advised to upgrade. Users
    unable to upgrade should not use the `/usb` redirection switch. (CVE-2022-39318)

  - FreeRDP is a free remote desktop protocol library and clients. 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. This issue has been addressed in version 2.9.0 and
    all users are advised to upgrade. Users unable to upgrade should not use the `/usb` redirection switch.
    (CVE-2022-39319)

  - FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP may attempt
    integer addition on too narrow types leads to allocation of a buffer too small holding the data written. A
    malicious server can trick a FreeRDP based client to read out of bound data and send it back to the
    server. This issue has been addressed in version 2.9.0 and all users are advised to upgrade. Users unable
    to upgrade should not use the `/usb` redirection switch. (CVE-2022-39320)

  - FreeRDP is a free remote desktop protocol library and clients. 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. This issue has been addressed in version 2.9.0
    and all users are advised to upgrade. Users unable to upgrade should not use the `/drive`, `/drives` or
    `+home-drive` redirection switch. (CVE-2022-39347)

  - FreeRDP is a free remote desktop protocol library and clients. 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. This issue has been addressed in version 2.9.0 and all
    users are advised to upgrade. Users unable to upgrade should not use the drive redirection channel -
    command line options `/drive`, `+drives` or `+home-drive`. (CVE-2022-41877)

  - 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-2023-39350)

  - 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-2023-39351)

  - 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-2023-39352)

  - 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-2023-39353)

  - 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-2023-39354)

  - 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-2023-39356)

  - 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-2023-40181)

  - 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-2023-40186)

  - 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-2023-40188)

  - 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 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-2023-40567)

  - 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 `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-2023-40569)

  - 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-2023-40589)

  - 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-2024-32039)

  - 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-2024-32040)

  - 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 are vulnerable to out-of-bounds read. Versions 3.5.0 and 2.11.6 patch
    the issue. As a workaround, deactivate `/gfx` (on by default, set `/bpp` or `/rfx` options instead.
    (CVE-2024-32041)

  - 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-2024-32458)

  - 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-2024-32459)

  - 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-2024-32460)

  - 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-2024-32658)

  - 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 if `((nWidth == 0) and (nHeight == 0))`. 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. 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-2024-32660)

  - 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. (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 out-of-bounds read. This occurs when `WCHAR` string is read with twice the size it
    has and converted to `UTF-8`, `base64` decoded. The string is only used to compare against the redirection
    server certificate. Version 3.5.1 contains a patch for the issue. No known workarounds are available.
    (CVE-2024-32662)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package
is installed.");
  script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation
guidance.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-2835");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2024-22211");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:freerdp");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item("global_settings/vendor_unpatched"))
exit(0, "Unpatched Vulnerabilities Detection not active.");

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'pkgs': [
      {'reference':'freerdp', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'unpatched_pkg':'freerdp'}
    ]
  }
];


var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);
  foreach var pkg ( constraint_array['pkgs'] ) {
    var unpatched_pkg = NULL;
    var _release = NULL;
    var sp = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['unpatched_pkg'])) unpatched_pkg = pkg['unpatched_pkg'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (unpatched_pkg &&
        _release &&
        (!exists_check || rpm_exists(release:_release, rpm:exists_check)) &&
        unpatched_package_exists(release:_release, package:unpatched_pkg, cves: cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : unpatched_packages_report()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'freerdp');
}