CVE-2020-11523

freerdp: Integer overflow in region.c

Severity Score

6.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

libfreerdp/gdi/region.c in FreeRDP versions > 1.0 through 2.0.0-rc4 has an Integer Overflow.

El archivo libfreerdp/gdi/region.c en FreeRDP versiones posteriores a 1.0 hasta 2.0.0-rc4, presenta un Desbordamiento de Enteros.

A flaw was found in FreeRDP in versions between 1.0 and 2.0.0. An integer overflow was found in the region.c function which could allow an attacker the ability to control the RDP server as well as the data sent to the client. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-04-04 CVE Reserved
2020-05-15 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-09-08 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-190: Integer Overflow or Wraparound

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html	Mailing List

URL	Date	SRC
https://pub.freerdp.com/cve/CVE-2020-11523/pocAnalysis_2.pdf	2024-08-04

URL	Date	SRC
https://github.com/FreeRDP/FreeRDP/commits/master	2022-07-30
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qrh-8cp8-4x42	2022-07-30

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html	2022-07-30
https://usn.ubuntu.com/4379-1	2022-07-30
https://usn.ubuntu.com/4382-1	2022-07-30
https://access.redhat.com/security/cve/CVE-2020-11523	2020-06-02
https://bugzilla.redhat.com/show_bug.cgi?id=1836234	2020-06-02

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"				> 1.0.0 < 2.0.0 Search vendor "Freerdp" for product "Freerdp" and version " > 1.0.0 < 2.0.0"		-		Affected
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				2.0.0 Search vendor "Freerdp" for product "Freerdp" and version "2.0.0"		-		Affected
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				2.0.0 Search vendor "Freerdp" for product "Freerdp" and version "2.0.0"		rc0		Affected
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				2.0.0 Search vendor "Freerdp" for product "Freerdp" and version "2.0.0"		rc1		Affected
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				2.0.0 Search vendor "Freerdp" for product "Freerdp" and version "2.0.0"		rc2		Affected
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				2.0.0 Search vendor "Freerdp" for product "Freerdp" and version "2.0.0"		rc3		Affected
Freerdp Search vendor "Freerdp"		Freerdp Search vendor "Freerdp" for product "Freerdp"				2.0.0 Search vendor "Freerdp" for product "Freerdp" and version "2.0.0"		rc4		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		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