CVE-2020-11038

Integer Overflow to Buffer Overflow in FreeRDP

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In FreeRDP less than or equal to 2.0.0, an Integer Overflow to Buffer Overflow exists. When using /video redirection, a manipulated server can instruct the client to allocate a buffer with a smaller size than requested due to an integer overflow in size calculation. With later messages, the server can manipulate the client to write data out of bound to the previously allocated buffer. This has been patched in 2.1.0.

En FreeRDP versiones anteriores o iguales a 2.0.0, se presenta un Desbordamiento de Enteros en un Desbordamiento de Búfer. Cuando se usa una redirección de /video, un servidor manipulado puede instruir al cliente para que asigne un búfer con un tamaño menor que el solicitado debido a un desbordamiento de enteros en el cálculo del tamaño. Con mensajes posteriores, el servidor puede manipular al cliente para que escriba datos fuera del límite en el buffer previamente asignado. Esto ha sido parcheado en la versión 2.1.0.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

High

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-03-30 CVE Reserved
2020-05-29 CVE Published
2023-10-25 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound
CWE-680: Integer Overflow to Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (5)

URL	Tag	Source
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h25x-cqr6-fp6g	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html	2023-10-24
https://access.redhat.com/security/cve/CVE-2020-11038	2020-11-04
https://bugzilla.redhat.com/show_bug.cgi?id=1848018	2020-11-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				< 2.1.0 Search vendor "Freerdp" for product "Freerdp" and version " < 2.1.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.1 Search vendor "Opensuse" for product "Leap" and version "15.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected