Bug 1671359 (CVE-2018-8786) - CVE-2018-8786 freerdp: Integer truncation leading to heap-based buffer overflow in update_read_bitmap_update() function
Summary: CVE-2018-8786 freerdp: Integer truncation leading to heap-based buffer overfl...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-8786
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1671370 1684152 1684153 1684154
Blocks: 1671368
TreeView+ depends on / blocked
 
Reported: 2019-01-31 13:30 UTC by Andrej Nemec
Modified: 2020-04-27 16:39 UTC (History)
6 users (show)

Fixed In Version: freerdp 2.0.0-rc4
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in freerdp in versions prior to version 2.0.0-rc4. An integer truncation that leads to a heap-based buffer overflow in the update_read_bitmap_update() function results in a memory corruption. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:46:55 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:0697 0 None None None 2019-04-02 11:37:04 UTC

Description Andrej Nemec 2019-01-31 13:30:27 UTC 
FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_update() and results in a memory corruption.

Upstream patch:

https://github.com/FreeRDP/FreeRDP/commit/445a5a42c500ceb80f8fa7f2c11f3682538033f3
Comment 1 Andrej Nemec 2019-01-31 13:44:16 UTC 
Created freerdp tracking bugs for this issue:

Affects: epel-6 [bug 1671370]
Comment 3 Riccardo Schirone 2019-02-28 15:03:01 UTC 
The attacker needs to either hijack the communication between a FreeRDP client and a valid server or he needs to compromise a server for the attack to be successful.
Comment 4 Riccardo Schirone 2019-02-28 15:04:02 UTC 
The memory corruption in update_read_bitmap_update() can be used to make the FreeRDP application crash or to execute arbitrary code in the context of the client system.
Comment 8 Riccardo Schirone 2019-02-28 15:09:56 UTC 
Created freerdp tracking bugs for this issue:

Affects: fedora-all [bug 1684154]
Comment 9 errata-xmlrpc 2019-04-02 11:37:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0697 https://access.redhat.com/errata/RHSA-2019:0697
Note You need to log in before you can comment on or make changes to this bug.