Vulnerabilities > CVE-2018-8789 - Out-of-bounds Read vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
FreeRDP prior to version 2.0.0-rc4 contains several Out-Of-Bounds Reads in the NTLM Authentication module that results in a Denial of Service (segfault).
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 20 | |
| OS | 4 | |
| OS | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Overread Buffers An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0539-1.NASL description This update for freerdp to version 2.0.0~rc4 fixes the following issues : Security issues fixed : CVE-2018-0886: Fix a remote code execution vulnerability (CredSSP) (bsc#1085416, bsc#1087240, bsc#1104918) CVE-2018-8789: Fix several denial of service vulnerabilities in the in the NTLM Authentication module (bsc#1117965) CVE-2018-8785: Fix a potential remote code execution vulnerability in the zgfx_decompress function (bsc#1117967) CVE-2018-8786: Fix a potential remote code execution vulnerability in the update_read_bitmap_update function (bsc#1117966) CVE-2018-8787: Fix a potential remote code execution vulnerability in the gdi_Bitmap_Decompress function (bsc#1117964) CVE-2018-8788: Fix a potential remote code execution vulnerability in the nsc_rle_decode function (bsc#1117963) CVE-2018-8784: Fix a potential remote code execution vulnerability in the zgfx_decompress_segment function (bsc#1116708) CVE-2018-1000852: Fixed a remote memory access in the drdynvc_process_capability_request function (bsc#1120507) Other issues: Upgraded to version 2.0.0-rc4 (FATE#326739) Security and stability improvements, including bsc#1103557 and bsc#1112028 gateway: multiple fixes and improvements client/X11: support for rail (remote app) icons was added The licensing code was re-worked: Per-device licenses are now saved on the client and used on re-connect: WARNING: this is a change in FreeRDP behavior regarding licensing. If the old behavior is required, or no licenses should be saved use the new command line option +old-license (gh#/FreeRDP/FreeRDP#4979) Improved order handling - only orders that were enable during capability exchange are accepted. WARNING and NOTE: some servers do improperly send orders that weren last seen 2020-06-01 modified 2020-06-02 plugin id 122608 published 2019-03-05 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122608 title SUSE SLED15 / SLES15 Security Update : freerdp (SUSE-SU-2019:0539-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-96.NASL description This update for freerdp fixes the following issues : Security issues fixed : - CVE-2018-0886: Fix a remote code execution vulnerability (CredSSP) (bsc#1085416, bsc#1087240, bsc#1104918) - CVE-2018-8789: Fix several denial of service vulnerabilities in the in the NTLM Authentication module (bsc#1117965) - CVE-2018-8785: Fix a potential remote code execution vulnerability in the zgfx_decompress function (bsc#1117967) - CVE-2018-8786: Fix a potential remote code execution vulnerability in the update_read_bitmap_update function (bsc#1117966) - CVE-2018-8787: Fix a potential remote code execution vulnerability in the gdi_Bitmap_Decompress function (bsc#1117964) - CVE-2018-8788: Fix a potential remote code execution vulnerability in the nsc_rle_decode function (bsc#1117963) - CVE-2018-8784: Fix a potential remote code execution vulnerability in the zgfx_decompress_segment function (bsc#1116708) - CVE-2018-1000852: Fixed a remote memory access in the drdynvc_process_capability_request function (bsc#1120507) This update was imported from the SUSE:SLE-12-SP2:Update update project. last seen 2020-03-18 modified 2019-01-30 plugin id 121462 published 2019-01-30 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121462 title openSUSE Security Update : freerdp (openSUSE-2019-96) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-325.NASL description This update for freerdp to version 2.0.0~rc4 fixes the following issues : Security issues fixed : - CVE-2018-0886: Fix a remote code execution vulnerability (CredSSP) (bsc#1085416, bsc#1087240, bsc#1104918) - CVE-2018-8789: Fix several denial of service vulnerabilities in the in the NTLM Authentication module (bsc#1117965) - CVE-2018-8785: Fix a potential remote code execution vulnerability in the zgfx_decompress function (bsc#1117967) - CVE-2018-8786: Fix a potential remote code execution vulnerability in the update_read_bitmap_update function (bsc#1117966) - CVE-2018-8787: Fix a potential remote code execution vulnerability in the gdi_Bitmap_Decompress function (bsc#1117964) - CVE-2018-8788: Fix a potential remote code execution vulnerability in the nsc_rle_decode function (bsc#1117963) - CVE-2018-8784: Fix a potential remote code execution vulnerability in the zgfx_decompress_segment function (bsc#1116708) - CVE-2018-1000852: Fixed a remote memory access in the drdynvc_process_capability_request function (bsc#1120507) Other issues : - Upgraded to version 2.0.0-rc4 (FATE#326739) - Security and stability improvements, including bsc#1103557 and bsc#1112028 - gateway: multiple fixes and improvements - client/X11: support for rail (remote app) icons was added - The licensing code was re-worked: Per-device licenses are now saved on the client and used on re-connect: WARNING: this is a change in FreeRDP behavior regarding licensing. If the old behavior is required, or no licenses should be saved use the new command line option +old-license (gh#/FreeRDP/FreeRDP#4979) - Improved order handling - only orders that were enable during capability exchange are accepted. WARNING and NOTE: some servers do improperly send orders that weren last seen 2020-06-01 modified 2020-06-02 plugin id 122847 published 2019-03-14 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122847 title openSUSE Security Update : freerdp (openSUSE-2019-325) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1666.NASL description For the FreeRDP version in Debian jessie LTS a security and functionality update has recently been provided. FreeRDP is a free re-implementation of the Microsoft RDP protocol (server and client side) with freerdp-x11 being the most common RDP client these days. Functional improvements : With help from FreeRDP upstream (cudos to Bernhard Miklautz and Martin Fleisz) we are happy to announce that RDP proto v6 and CredSSP v3 support have been backported to the old FreeRDP 1.1 branch. Since Q2/2018, Microsoft Windows servers and clients received an update that defaulted their RDP server to proto version 6. Since this change, people have not been able anymore to connect to recently updated MS Windows machines using old the FreeRDP 1.1 branch as found in Debian jessie LTS and Debian stretch. With the recent FreeRDP upload to Debian jessie LTS, connecting to up-to-date MS Windows machines is now again possible. Security issues : CVE-2018-8786 FreeRDP contained an integer truncation that lead to a heap-based buffer overflow in function update_read_bitmap_update() and resulted in a memory corruption and probably even a remote code execution. CVE-2018-8787 FreeRDP contained an integer overflow that leads to a heap-based buffer overflow in function gdi_Bitmap_Decompress() and resulted in a memory corruption and probably even a remote code execution. CVE-2018-8788 FreeRDP contained an out-of-bounds write of up to 4 bytes in function nsc_rle_decode() that resulted in a memory corruption and possibly even a remote code execution. CVE-2018-8789 FreeRDP contained several out-of-bounds reads in the NTLM authentication module that resulted in a denial of service (segfault). For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 122066 published 2019-02-11 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122066 title Debian DLA-1666-1 : freerdp security update NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1646.NASL description According to the versions of the freerdp packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress_segment() that results in a memory corruption and probably even a remote code execution.(CVE-2018-8784) - FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress() that results in a memory corruption and probably even a remote code execution.(CVE-2018-8785) - FreeRDP prior to version 2.0.0-rc4 contains several Out-Of-Bounds Reads in the NTLM Authentication module that results in a Denial of Service (segfault).(CVE-2018-8789) - 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 last seen 2020-05-03 modified 2019-06-27 plugin id 126273 published 2019-06-27 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126273 title EulerOS 2.0 SP8 : freerdp (EulerOS-SA-2019-1646) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3845-2.NASL description USN-3845-1 fixed several vulnerabilities in FreeRDP. This update provides the corresponding update for Ubuntu 18.04 LTS and Ubuntu 18.10. Original advisory details : Eyal Itkin discovered FreeRDP incorrectly handled certain stream encodings. 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 applies to Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-8784, CVE-2018-8785) Eyal Itkin discovered FreeRDP incorrectly handled bitmaps. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-8786, CVE-2018- 8787) Eyal Itkin discovered FreeRDP incorrectly handled certain stream encodings. 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 applies to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018- 8788) Eyal Itkin discovered FreeRDP incorrectly handled NTLM authentication. 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 applies to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018- 8789). 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. last seen 2020-06-01 modified 2020-06-02 plugin id 125542 published 2019-05-29 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125542 title Ubuntu 18.04 LTS / 18.10 : FreeRDP vulnerabilities (USN-3845-2) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3845-1.NASL description Eyal Itkin discovered FreeRDP incorrectly handled certain stream encodings. 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 applies to Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-8784, CVE-2018-8785) Eyal Itkin discovered FreeRDP incorrectly handled bitmaps. A malicious server could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-8786, CVE-2018-8787) Eyal Itkin discovered FreeRDP incorrectly handled certain stream encodings. 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 applies to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-8788) Eyal Itkin discovered FreeRDP incorrectly handled NTLM authentication. 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 applies to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-8789). 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. last seen 2020-04-10 modified 2018-12-13 plugin id 119655 published 2018-12-13 reporter Ubuntu Security Notice (C) 2018-2020 Canonical, Inc. / NASL script (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119655 title Ubuntu 14.04 LTS : freerdp, freerdp2 vulnerabilities (USN-3845-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0134-1.NASL description This update for freerdp fixes the following issues : Security issues fixed : CVE-2018-0886: Fix a remote code execution vulnerability (CredSSP) (bsc#1085416, bsc#1087240, bsc#1104918) CVE-2018-8789: Fix several denial of service vulnerabilities in the in the NTLM Authentication module (bsc#1117965) CVE-2018-8785: Fix a potential remote code execution vulnerability in the zgfx_decompress function (bsc#1117967) CVE-2018-8786: Fix a potential remote code execution vulnerability in the update_read_bitmap_update function (bsc#1117966) CVE-2018-8787: Fix a potential remote code execution vulnerability in the gdi_Bitmap_Decompress function (bsc#1117964) CVE-2018-8788: Fix a potential remote code execution vulnerability in the nsc_rle_decode function (bsc#1117963) CVE-2018-8784: Fix a potential remote code execution vulnerability in the zgfx_decompress_segment function (bsc#1116708) CVE-2018-1000852: Fixed a remote memory access in the drdynvc_process_capability_request function (bsc#1120507) 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. last seen 2020-03-18 modified 2019-01-22 plugin id 121302 published 2019-01-22 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121302 title SUSE SLED12 Security Update : freerdp (SUSE-SU-2019:0134-1)
References
- http://www.securityfocus.com/bid/106938
- http://www.securityfocus.com/bid/106938
- https://github.com/FreeRDP/FreeRDP/commit/2ee663f39dc8dac3d9988e847db19b2d7e3ac8c6
- https://github.com/FreeRDP/FreeRDP/commit/2ee663f39dc8dac3d9988e847db19b2d7e3ac8c6
- https://lists.debian.org/debian-lts-announce/2019/02/msg00015.html
- https://lists.debian.org/debian-lts-announce/2019/02/msg00015.html
- https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
- https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
- https://usn.ubuntu.com/3845-1/
- https://usn.ubuntu.com/3845-1/
- https://usn.ubuntu.com/3845-2/
- https://usn.ubuntu.com/3845-2/