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AUSCERT External Security Bulletin Redistribution
multiple vulnerabilities fixed in freerdp
11 February 2019
AusCERT Security Bulletin Summary
Operating System: Debian GNU/Linux 8
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2018-8789 CVE-2018-8788 CVE-2018-8787
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Package : freerdp
Version : 1.1.0~git20140921.1.440916e+dfsg1-13~deb8u3
CVE ID : CVE-2018-8786 CVE-2018-8787 CVE-2018-8788 CVE-2018-8789
Debian Bug :
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.
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.
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.
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.
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.
FreeRDP contained several out-of-bounds reads in the NTLM
authentication module that resulted in a denial of service
For Debian 8 "Jessie", these security problems have been fixed in version
We recommend that you upgrade your freerdp packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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