The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1849 advisory.

    [2:2.2.0-1]
    - Update to 2.2.0 (rhbz#1881971)

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

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

Bernhard Miklautz reports :

- Integer overflow 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)

Bugfix and CVE release.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4481-1 advisory.

    It was discovered that FreeRDP incorrectly handled certain memory operations. A remote attacker could use     this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary     code.

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

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

This update for freerdp fixes the following issues :

  - CVE-2020-15103: Fix integer overflow due to missing     input sanitation in rdpegfx channel (bsc#1174321).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

The remote NewStart CGSL host, running version MAIN 6.02, has freerdp packages installed that are affected by multiple vulnerabilities:

  - In FreeRDP before version 2.1.2, an out of bound reads 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-2020-11095)

  - In FreeRDP before version 2.1.2, there is a global OOB read in update_read_cache_bitmap_v3_order. As a     workaround, one can disable bitmap cache with -bitmap-cache (default). This is fixed in version 2.1.2.
    (CVE-2020-11096)

  - 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 before version 2.1.2, there is an out-of-bound read in glyph_cache_put. This affects all     FreeRDP clients with `+glyph-cache` option enabled This is fixed in version 2.1.2. (CVE-2020-11098)

  - In FreeRDP before version 2.1.2, there is an out of bounds read in     license_read_new_or_upgrade_license_packet. A manipulated license packet can lead to out of bound reads to     an internal buffer. This is fixed in version 2.1.2. (CVE-2020-11099)

  - 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)

  - In FreeRDP before version 2.1.2, there is an out of bounds read in RLEDECOMPRESS. All FreeRDP based     clients with sessions with color depth < 32 are affected. This is fixed in version 2.1.2. (CVE-2020-4033)

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

According to the versions of the freerdp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In FreeRDP less than or equal to 2.0.0, by providing manipulated input a malicious client can create a     double free condition and crash the server. This is fixed in version 2.1.0. (CVE-2020-11017)

  - In FreeRDP less than or equal to 2.0.0, a possible resource exhaustion vulnerability can be performed.
    Malicious clients could trigger out of bound reads causing memory allocation with random size. This has     been fixed in 2.1.0. (CVE-2020-11018)

  - In FreeRDP less than or equal to 2.0.0, when running with logger set to 'WLOG_TRACE', a possible crash of     application could occur due to a read of an invalid array index. Data could be printed as string to local     terminal. This has been fixed in 2.1.0. (CVE-2020-11019)

  - In FreeRDP less than or equal to 2.0.0, an Integer Overflow to Buffer Overflow exists. When using /video     redirection, a manipulated server can instruct the client to allocate a buffer with a smaller size than     requested due to an integer overflow in size calculation. With later messages, the server can manipulate     the client to write data out of bound to the previously allocated buffer. This has been patched in 2.1.0.
    (CVE-2020-11038)

  - In FreeRDP less than or equal to 2.0.0, there is an out-of-bound data read from memory in     clear_decompress_subcode_rlex, visualized on screen as color. This has been patched in 2.1.0.
    (CVE-2020-11040)

  - In FreeRDP less than or equal to 2.0.0, an outside controlled array index is used unchecked for data used     as configuration for sound backend (alsa, oss, pulse, ...). The most likely outcome is a crash of the     client instance followed by no or distorted sound or a session disconnect. If a user cannot upgrade to the     patched version, a workaround is to disable sound for the session. This has been patched in 2.1.0.
    (CVE-2020-11041)

  - In FreeRDP after 1.1 and before 2.0.0, a stream out-of-bounds seek in rdp_read_font_capability_set could     lead to a later out-of-bounds read. As a result, a manipulated client or server might force a disconnect     due to an invalid data read. This has been fixed in 2.0.0. (CVE-2020-11058)

  - In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in     ntlm_read_ntlm_v2_client_challenge that reads up to 28 bytes out-of-bound to an internal structure. This     has been fixed in 2.1.0. (CVE-2020-11086)

  - In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in ntlm_read_AuthenticateMessage.
    This has been fixed in 2.1.0. (CVE-2020-11087)

  - In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in ntlm_read_NegotiateMessage. This     has been fixed in 2.1.0. (CVE-2020-11088)

  - libfreerdp/codec/planar.c in FreeRDP version > 1.0 through 2.0.0-rc4 has an Out-of-bounds Write.
    (CVE-2020-11521)

  - libfreerdp/gdi/region.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Integer Overflow.
    (CVE-2020-11523)

  - libfreerdp/cache/bitmap.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Out of bounds read.
    (CVE-2020-11525)

  - libfreerdp/core/update.c in FreeRDP versions > 1.1 through 2.0.0-rc4 has an Out-of-bounds Read.
    (CVE-2020-11526)

  - An issue was discovered in FreeRDP before 2.1.1. An out-of-bounds (OOB) read vulnerability has been     detected in security_fips_decrypt in libfreerdp/core/security.c due to an uninitialized value.
    (CVE-2020-13397)

  - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0002 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2020-11018     In FreeRDP less than or equal to 2.0.0, a possible resource exhaustion vulnerability can be performed.
    Malicious clients could trigger out of bound reads causing memory allocation with random size. This has     been fixed in 2.1.0.

    CVE-2020-11019     In FreeRDP less than or equal to 2.0.0, when running with logger set to WLOG_TRACE, a possible crash of     application could occur due to a read of an invalid array index. Data could be printed as string to local     terminal. This has been fixed in 2.1.0.

    CVE-2020-11038:
    In FreeRDP less than or equal to 2.0.0, an Integer Overflow to Buffer Overflow exists. When using /video     redirection, a manipulated server can instruct the client to allocate a buffer with a smaller size than     requested due to an integer overflow in size calculation. With later messages, the server can manipulate     the client to write data out of bound to the previously allocated buffer. This has been patched in 2.1.0.

    CVE-2020-11039:
    In FreeRDP less than or equal to 2.0.0, when using a manipulated server with USB redirection enabled     (nearly) arbitrary memory can be read and written due to integer overflows in length checks. This has been     patched in 2.1.0.

    CVE-2020-11040:
    In FreeRDP less than or equal to 2.0.0, there is an out-of-bound data read from memory in     clear_decompress_subcode_rlex, visualized on screen as color. This has been patched in 2.1.0.

    CVE-2020-11041:
    In FreeRDP less than or equal to 2.0.0, an outside controlled array index is used unchecked for data used     as configuration for sound backend (alsa, oss, pulse, ...). The most likely outcome is a crash of the     client instance followed by no or distorted sound or a session disconnect. If a user cannot upgrade to the     patched version, a workaround is to disable sound for the session. This has been patched in 2.1.0.

    CVE-2020-11043:
    In FreeRDP less than or equal to 2.0.0, there is an out-of-bounds read in rfx_process_message_tileset.
    Invalid data fed to RFX decoder results in garbage on screen (as colors). This has been patched in 2.1.0.

    CVE-2020-11058:
    In FreeRDP after 1.1 and before 2.0.0, a stream out-of-bounds seek in rdp_read_font_capability_set could     lead to a later out-of-bounds read. As a result, a manipulated client or server might force a disconnect     due to an invalid data read. This has been fixed in 2.0.0.

    CVE-2020-11085:
    In FreeRDP before 2.1.0, there is an out-of-bounds read in cliprdr_read_format_list. Clipboard format data     read (by client or server) might read data out-of-bounds. This has been fixed in 2.1.0.

    CVE-2020-11086:
    In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in     ntlm_read_ntlm_v2_client_challenge that reads up to 28 bytes out-of-bound to an internal structure. This     has been fixed in 2.1.0.

    CVE-2020-11087:
    In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in ntlm_read_AuthenticateMessage.
    This has been fixed in 2.1.0.

    CVE-2020-11088:
    In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in ntlm_read_NegotiateMessage. This     has been fixed in 2.1.0.

    CVE-2020-11089:
    In FreeRDP before 2.1.0, there is an out-of-bound read in irp functions (parallel_process_irp_create,     serial_process_irp_create, drive_process_irp_write, printer_process_irp_write, rdpei_recv_pdu,     serial_process_irp_write). This has been fixed in 2.1.0.

    CVE-2020-11095:
    In FreeRDP before version 2.1.2, an out of bound reads 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-2020-11096:
    In FreeRDP before version 2.1.2, there is a global OOB read in update_read_cache_bitmap_v3_order. As a     workaround, one can disable bitmap cache with -bitmap-cache (default). This is fixed in version 2.1.2.

    CVE-2020-11097:
    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-2020-11098:
    In FreeRDP before version 2.1.2, there is an out-of-bound read in glyph_cache_put. This affects all     FreeRDP clients with `+glyph-cache` option enabled This is fixed in version 2.1.2.

    CVE-2020-11099:
    In FreeRDP before version 2.1.2, there is an out of bounds read in     license_read_new_or_upgrade_license_packet. A manipulated license packet can lead to out of bound reads to     an internal buffer. This is fixed in version 2.1.2.

    CVE-2020-11522:
    libfreerdp/gdi/gdi.c in FreeRDP > 1.0 through 2.0.0-rc4 has an Out-of-bounds Read.

    CVE-2020-11525:
    libfreerdp/cache/bitmap.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Out of bounds read.

    CVE-2020-11526:
    libfreerdp/core/update.c in FreeRDP versions > 1.1 through 2.0.0-rc4 has an Out-of-bounds Read.

    CVE-2020-13396:
    An issue was discovered in FreeRDP before 2.1.1. An out-of-bounds (OOB) read vulnerability has been     detected in ntlm_read_ChallengeMessage in winpr/libwinpr/sspi/NTLM/ntlm_message.c.

    CVE-2020-13397:
    An issue was discovered in FreeRDP before 2.1.1. An out-of-bounds (OOB) read vulnerability has been     detected in security_fips_decrypt in libfreerdp/core/security.c due to an uninitialized value.

    CVE-2020-15103:
    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-2020-4030:
    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-2020-4033:
    In FreeRDP before version 2.1.2, there is an out of bounds read in RLEDECOMPRESS. All FreeRDP based     clients with sessions with color depth < 32 are affected. This is fixed in version 2.1.2.

    CVE-2021-41159:
    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input     data. A malicious gateway might allow client memory to be written out of bounds. This issue has been     resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections     if possible or use a direct connection without a gateway.

    CVE-2021-41160:
    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    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. This issue has been patched in FreeRDP 2.4.1.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1849 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

    The following packages have been upgraded to a later upstream version: freerdp (2.2.0). (BZ#1881971)

    Security Fix(es):

    * freerdp: out of bounds read in TrioParse (CVE-2020-4030)

    * freerdp: out of bound reads resulting in accessing memory location outside of static array     PRIMARY_DRAWING_ORDER_FIELD_BYTES (CVE-2020-11095)

    * freerdp: out of bounds read in PRIMARY_DRAWING_ORDER_FIELD_BYTES (CVE-2020-11097)

    * freerdp: out of bounds read in license_read_new_or_upgrade_license_packet (CVE-2020-11099)

    * freerdp: integer overflow due to missing input sanitation in rdpegfx channel (CVE-2020-15103)

    * freerdp: out-of-bounds read in RLEDECOMPRESS (CVE-2020-4033)

    * freerdp: out-of-bound read in update_read_cache_bitmap_v3_order (CVE-2020-11096)

    * freerdp: out-of-bound read in glyph_cache_put (CVE-2020-11098)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:1849 advisory.

  - freerdp: out of bound reads resulting in accessing memory location outside of static array     PRIMARY_DRAWING_ORDER_FIELD_BYTES (CVE-2020-11095)

  - freerdp: out-of-bound read in update_read_cache_bitmap_v3_order (CVE-2020-11096)

  - freerdp: out of bounds read in PRIMARY_DRAWING_ORDER_FIELD_BYTES (CVE-2020-11097)

  - freerdp: out-of-bound read in glyph_cache_put (CVE-2020-11098)

  - freerdp: out of bounds read in license_read_new_or_upgrade_license_packet (CVE-2020-11099)

  - freerdp: integer overflow due to missing input sanitation in rdpegfx channel (CVE-2020-15103)

  - freerdp: out of bounds read in TrioParse (CVE-2020-4030)

  - freerdp: out-of-bounds read in RLEDECOMPRESS (CVE-2020-4033)

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

The remote AlmaLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2021:1849 advisory.

  - 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)

  - In FreeRDP before version 2.1.2, there is an out of bounds read in RLEDECOMPRESS. All FreeRDP based     clients with sessions with color depth < 32 are affected. This is fixed in version 2.1.2. (CVE-2020-4033)

  - In FreeRDP before version 2.1.2, an out of bound reads 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-2020-11095)

  - In FreeRDP before version 2.1.2, there is a global OOB read in update_read_cache_bitmap_v3_order. As a     workaround, one can disable bitmap cache with -bitmap-cache (default). This is fixed in version 2.1.2.
    (CVE-2020-11096)

  - 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 before version 2.1.2, there is an out-of-bound read in glyph_cache_put. This affects all     FreeRDP clients with `+glyph-cache` option enabled This is fixed in version 2.1.2. (CVE-2020-11098)

  - In FreeRDP before version 2.1.2, there is an out of bounds read in     license_read_new_or_upgrade_license_packet. A manipulated license packet can lead to out of bound reads to     an internal buffer. This is fixed in version 2.1.2. (CVE-2020-11099)

  - 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)

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

ID	Name	Product	Family	Published	Updated	Severity
149961	Oracle Linux 8 : freerdp (ELSA-2021-1849)	Nessus	Oracle Linux Local Security Checks	5/26/2021	5/27/2025	medium
182754	Debian dla-3606 : freerdp2-dev - security update	Nessus	Debian Local Security Checks	10/8/2023	1/22/2025	critical
139111	FreeBSD : FreeRDP -- Integer overflow in RDPEGFX channel (a955cdb7-d089-11ea-8c6f-080027eedc6a)	Nessus	FreeBSD Local Security Checks	7/30/2020	2/27/2024	low
139263	Fedora 31 : 2:freerdp (2020-a3432485db)	Nessus	Fedora Local Security Checks	8/3/2020	5/27/2025	medium
140179	Ubuntu 18.04 LTS / 20.04 LTS : FreeRDP vulnerabilities (USN-4481-1)	Nessus	Ubuntu Local Security Checks	9/2/2020	5/27/2025	medium
140367	openSUSE Security Update : freerdp (openSUSE-2020-1332)	Nessus	SuSE Local Security Checks	9/8/2020	2/21/2024	low
160811	NewStart CGSL MAIN 6.02 : freerdp Multiple Vulnerabilities (NS-SA-2022-0063)	Nessus	NewStart CGSL Local Security Checks	5/9/2022	5/27/2025	medium
160170	EulerOS 2.0 SP8 : freerdp (EulerOS-SA-2022-1564)	Nessus	Huawei Local Security Checks	4/25/2022	10/31/2023	medium
236628	Alibaba Cloud Linux 3 : 0002: freerdp (ALINUX3-SA-2022:0002)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/14/2025	high
223311	Linux Distros Unpatched Vulnerability : CVE-2020-15103	Nessus	Misc.	3/4/2025	9/3/2025	low
149700	RHEL 8 : freerdp (RHSA-2021:1849)	Nessus	Red Hat Local Security Checks	5/19/2021	5/27/2025	medium
149733	CentOS 8 : freerdp (CESA-2021:1849)	Nessus	CentOS Local Security Checks	5/19/2021	5/27/2025	medium
157588	AlmaLinux 8 : freerdp (ALSA-2021:1849)	Nessus	Alma Linux Local Security Checks	2/9/2022	5/27/2025	medium
139103	Fedora 32 : 2:freerdp (2020-8d5f86e29a)	Nessus	Fedora Local Security Checks	7/30/2020	5/27/2025	medium

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