Tyler Bohan of Talos discovered that FreeRDP, a free implementation of the Remote Desktop Protocol (RDP), contained several vulnerabilities that allowed a malicious remote server or a man-in-the-middle to either cause a DoS by forcibly terminating the client, or execute arbitrary code on the client side.

Update to latest snapshot that contains fixes for the latest Talos discovered CVEs.

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.

This update for freerdp fixes the following issues :

  - CVE-2017-2834: Out-of-bounds write in license_recv()     (bsc#1050714)

  - CVE-2017-2835: Out-of-bounds write in rdp_recv_tpkt_pdu     (bsc#1050712)

  - CVE-2017-2836: Rdp Client Read Server Proprietary     Certificate Denial of Service (bsc#1050699)

  - CVE-2017-2837: Client GCC Read Server Security Data DoS     (bsc#1050704)

  - CVE-2017-2838: Client License Read Product Info Denial     of Service Vulnerability (bsc#1050708)

  - CVE-2017-2839: Client License Read Challenge Packet     Denial of Service (bsc#1050711)

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

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

  - In FreeRDP after 1.0 and before 2.0.0, there is an     out-of-bound read in in update_read_bitmap_data that     allows client memory to be read to an image buffer. The     result displayed on screen as colour.(CVE-2020-11045)

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

  - 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)

  - 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 code execution vulnerability exists in     the RDP receive 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 to trigger this     vulnerability.(CVE-2017-2835)

  - 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)

  - 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-2017-2839)

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.

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

  - FreeRDP before 1.1.0-beta+2013071101 allows remote     attackers to cause a denial of service (NULL pointer     dereference and application crash) by disconnecting     before authentication has finished.(CVE-2013-4119)

  - FreeRDP FreeRDP 2.0.0-rc3 released version before     commit 205c612820dac644d665b5bb1cdf437dc5ca01e3     contains a Other/Unknown vulnerability in     channels/drdynvc/client/drdynvc_main.c,     drdynvc_process_capability_request that can result in     The RDP server can read the client's memory.. This     attack appear to be exploitable via RDPClient must     connect the rdp server with echo option. This     vulnerability appears to have been fixed in after     commit     205c612820dac644d665b5bb1cdf437dc5ca01e3.(CVE-2018-1000     852)

  - FreeRDP before 1.1.0-beta1 allows remote attackers to     cause a denial of service (NULL pointer dereference and     application crash) via unspecified     vectors.(CVE-2013-4118)

  - Multiple integer overflows in client/X11/xf_graphics.c     in FreeRDP allow remote attackers to have an     unspecified impact via the width and height to the (1)     xf_Pointer_New or (2) xf_Bitmap_Decompress function,     which causes an incorrect amount of memory to be     allocated.(CVE-2014-0250)

  - Integer overflow in the license_read_scope_list     function in libfreerdp/core/license.c in FreeRDP     through 1.0.2 allows remote RDP servers to cause a     denial of service (application crash) or possibly have     unspecified other impact via a large ScopeCount value     in a Scope List in a Server License Request     packet.(CVE-2014-0791)

  - An exploitable code execution vulnerability exists in     the RDP receive 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 to trigger this     vulnerability.(CVE-2017-2835)

  - 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)

  - 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-2017-2839)

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.

It was discovered that FreeRDP incorrectly handled certain width and height values. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS.
(CVE-2014-0250)

It was discovered that FreeRDP incorrectly handled certain values in a Scope List. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-0791)

Tyler Bohan discovered that FreeRDP incorrectly handled certain length values. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-2834, CVE-2017-2835)

Tyler Bohan discovered that FreeRDP incorrectly handled certain packets. A malicious server could possibly use this issue to cause FreeRDP to crash, resulting in a denial of service. (CVE-2017-2836, CVE-2017-2837, CVE-2017-2838, CVE-2017-2839).

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

This update for freerdp fixes the following issues :

  - CVE-2017-2834: Out-of-bounds write in license_recv()     (bsc#1050714)

  - CVE-2017-2835: Out-of-bounds write in rdp_recv_tpkt_pdu     (bsc#1050712)

  - CVE-2017-2836: Rdp Client Read Server Proprietary     Certificate Denial of Service (bsc#1050699)

  - CVE-2017-2837: Client GCC Read Server Security Data DoS     (bsc#1050704)

  - CVE-2017-2838: Client License Read Product Info Denial     of Service Vulnerability (bsc#1050708)

  - CVE-2017-2839: Client License Read Challenge Packet     Denial of Service (bsc#1050711)

This update was imported from the SUSE:SLE-12-SP2:Update update project.

Tyler Bohan of Talos discovered that FreeRDP, a free implementation of the Remote Desktop Protocol (RDP), contained several vulnerabilities that allowed a malicious remote server or a man-in-the-middle to either cause a DoS by forcibly terminating the client, or execute arbitrary code on the client side.

For Debian 7 'Wheezy', these problems have been fixed in version 1.0.1-1.1+deb7u4.

We recommend that you upgrade your freerdp packages.

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

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

  - An exploitable code execution vulnerability exists in     the RDP receive 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 to trigger this     vulnerability.(CVE-2017-2835)

  - 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)

  - 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-2017-2839)

  - 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 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)

  - FreeRDP FreeRDP 2.0.0-rc3 released version before     commit 205c612820dac644d665b5bb1cdf437dc5ca01e3     contains a Other/Unknown vulnerability in     channels/drdynvc/client/drdynvc_main.c,     drdynvc_process_capability_request that can result in     The RDP server can read the client's memory.. This     attack appear to be exploitable via RDPClient must     connect the rdp server with echo option. This     vulnerability appears to have been fixed in after     commit     205c612820dac644d665b5bb1cdf437dc5ca01e3.(CVE-2018-1000     852)

  - Integer overflow in the license_read_scope_list     function in libfreerdp/core/license.c in FreeRDP     through 1.0.2 allows remote RDP servers to cause a     denial of service (application crash) or possibly have     unspecified other impact via a large ScopeCount value     in a Scope List in a Server License Request     packet.(CVE-2014-0791)

  - Multiple integer overflows in client/X11/xf_graphics.c     in FreeRDP allow remote attackers to have an     unspecified impact via the width and height to the (1)     xf_Pointer_New or (2) xf_Bitmap_Decompress function,     which causes an incorrect amount of memory to be     allocated.(CVE-2014-0250)

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.

ID	Name	Product	Family	Published	Updated	Severity
102097	Debian DSA-3923-1 : freerdp - security update	Nessus	Debian Local Security Checks	8/2/2017	1/4/2021	high
102277	Fedora 25 : 2:freerdp / remmina (2017-ed31e1f941)	Nessus	Fedora Local Security Checks	8/9/2017	1/6/2021	high
102693	SUSE SLED12 Security Update : freerdp (SUSE-SU-2017:2234-1)	Nessus	SuSE Local Security Checks	8/23/2017	1/6/2021	high
146158	EulerOS 2.0 SP5 : freerdp (EulerOS-SA-2021-1188)	Nessus	Huawei Local Security Checks	2/4/2021	1/23/2024	high
131609	EulerOS 2.0 SP2 : freerdp (EulerOS-SA-2019-2455)	Nessus	Huawei Local Security Checks	12/4/2019	4/8/2024	high
102260	Ubuntu 14.04 LTS / 16.04 LTS : FreeRDP vulnerabilities (USN-3380-1)	Nessus	Ubuntu Local Security Checks	8/8/2017	10/20/2023	high
102088	Fedora 26 : 2:freerdp / remmina (2017-4bc09c2364)	Nessus	Fedora Local Security Checks	8/1/2017	1/6/2021	high
102945	openSUSE Security Update : freerdp (openSUSE-2017-992)	Nessus	SuSE Local Security Checks	9/5/2017	1/19/2021	high
103095	Debian DLA-1095-1 : freerdp security update	Nessus	Debian Local Security Checks	9/11/2017	1/11/2021	high
132297	EulerOS 2.0 SP3 : freerdp (EulerOS-SA-2019-2580)	Nessus	Huawei Local Security Checks	12/19/2019	4/3/2024	high

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