Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
Required
Privileges Required
Low
Attack Vector
Network
0

CVE-2020-15103

Disclosure Date: July 27, 2020 •
CVE-2020-15103 CVSS v3 Base Score: 3.5
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Description

In FreeRDP less than or equal to 2.1.2, an integer overflow exists due to missing input sanitation in rdpegfx channel. All FreeRDP clients are affected. The input rectangles from the server are not checked against local surface coordinates and blindly accepted. A malicious server can send data that will crash the client later on (invalid length arguments to a memcpy) This has been fixed in 2.2.0. As a workaround, stop using command line arguments /gfx, /gfx-h264 and /network:auto

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CVSS V3 Severity and Metrics
Base Score:
3.5 Low
Impact Score:
1.4
Exploitability Score:
2.1
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
Low

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
FreeRDP <= 2.1.2
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • canonical,
  • debian,
  • fedoraproject,
  • freerdp,
  • opensuse

Products

  • debian linux 10.0,
  • fedora 31,
  • fedora 32,
  • freerdp,
  • leap 15.1,
  • ubuntu linux 18.04,
  • ubuntu linux 20.04
Technical Analysis