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Debian DLA-1666-1 : freerdp security update

critical Nessus Plugin ID 122066

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Synopsis

The remote Debian host is missing a security update.

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 'Jessie', these security problems have been fixed in version 1.1.0~git20140921.1.440916e+dfsg1-13~deb8u3.

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.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2019/02/msg00015.html

https://packages.debian.org/source/jessie/freerdp

Plugin Details

Severity: Critical

ID: 122066

File Name: debian_DLA-1666.nasl

Version: 1.5

Type: local

Agent: unix

Published: 2/11/2019

Updated: 6/21/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-8788

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:libfreerdp-plugins-standard-dbg, p-cpe:/a:debian:debian_linux:libwinpr-bcrypt0.1, p-cpe:/a:debian:debian_linux:freerdp-x11-dbg, p-cpe:/a:debian:debian_linux:libwinpr-input0.1, p-cpe:/a:debian:debian_linux:libwinpr-handle0.1, p-cpe:/a:debian:debian_linux:libwinpr-library0.1, p-cpe:/a:debian:debian_linux:libxfreerdp-client1.1, p-cpe:/a:debian:debian_linux:libwinpr-sspicli0.1, p-cpe:/a:debian:debian_linux:libfreerdp-crypto1.1, p-cpe:/a:debian:debian_linux:libwinpr-winhttp0.1, p-cpe:/a:debian:debian_linux:libfreerdp-client1.1, p-cpe:/a:debian:debian_linux:libfreerdp-dbg, p-cpe:/a:debian:debian_linux:libfreerdp-common1.1.0, p-cpe:/a:debian:debian_linux:libwinpr-pipe0.1, p-cpe:/a:debian:debian_linux:libwinpr-sspi0.1, p-cpe:/a:debian:debian_linux:libwinpr-thread0.1, p-cpe:/a:debian:debian_linux:libwinpr-error0.1, p-cpe:/a:debian:debian_linux:libfreerdp-cache1.1, p-cpe:/a:debian:debian_linux:libwinpr-rpc0.1, p-cpe:/a:debian:debian_linux:freerdp-x11, p-cpe:/a:debian:debian_linux:libfreerdp-primitives1.1, p-cpe:/a:debian:debian_linux:libfreerdp-utils1.1, p-cpe:/a:debian:debian_linux:libwinpr-utils0.1, p-cpe:/a:debian:debian_linux:libwinpr-registry0.1, p-cpe:/a:debian:debian_linux:libwinpr-environment0.1, p-cpe:/a:debian:debian_linux:libwinpr-dsparse0.1, p-cpe:/a:debian:debian_linux:libfreerdp-gdi1.1, p-cpe:/a:debian:debian_linux:libfreerdp-rail1.1, p-cpe:/a:debian:debian_linux:libwinpr-winsock0.1, p-cpe:/a:debian:debian_linux:libwinpr-pool0.1, p-cpe:/a:debian:debian_linux:libwinpr-synch0.1, p-cpe:/a:debian:debian_linux:libwinpr-io0.1, p-cpe:/a:debian:debian_linux:libwinpr-heap0.1, p-cpe:/a:debian:debian_linux:libxfreerdp-client-dbg, p-cpe:/a:debian:debian_linux:libwinpr-interlocked0.1, p-cpe:/a:debian:debian_linux:libwinpr-crt0.1, p-cpe:/a:debian:debian_linux:libwinpr-credui0.1, p-cpe:/a:debian:debian_linux:libwinpr-file0.1, p-cpe:/a:debian:debian_linux:libfreerdp-locale1.1, p-cpe:/a:debian:debian_linux:libwinpr-dev, p-cpe:/a:debian:debian_linux:libwinpr-timezone0.1, p-cpe:/a:debian:debian_linux:libwinpr-credentials0.1, p-cpe:/a:debian:debian_linux:libfreerdp-core1.1, p-cpe:/a:debian:debian_linux:libwinpr-dbg, p-cpe:/a:debian:debian_linux:libwinpr-crypto0.1, p-cpe:/a:debian:debian_linux:libfreerdp-plugins-standard, p-cpe:/a:debian:debian_linux:libfreerdp-dev, p-cpe:/a:debian:debian_linux:libwinpr-path0.1, p-cpe:/a:debian:debian_linux:libwinpr-sysinfo0.1, p-cpe:/a:debian:debian_linux:libwinpr-asn1-0.1, p-cpe:/a:debian:debian_linux:libfreerdp-codec1.1

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/9/2019

Vulnerability Publication Date: 11/29/2018

Reference Information

CVE: CVE-2018-8786, CVE-2018-8787, CVE-2018-8788, CVE-2018-8789