VDB-155875 · CVE-2020-11087 · Nessus 236628

FreeRDP up to 2.0.0 ntlm_read_AuthenticateMessage out-of-bounds

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.6	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in FreeRDP up to 2.0.0. Impacted is the function ntlm_read_AuthenticateMessage. This manipulation causes out-of-bounds. This vulnerability is registered as CVE-2020-11087. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in FreeRDP up to 2.0.0 and classified as problematic. Affected by this vulnerability is the function ntlm_read_AuthenticateMessage. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

In FreeRDP less than or equal to 2.0.0, there is an out-of-bound read in ntlm_read_AuthenticateMessage. This has been fixed in 2.1.0.

The weakness was published 05/29/2020 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2020-11087 since 03/30/2020. The attack can be launched remotely. Required for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 236628 (Alibaba Cloud Linux 3 : 0002: freerdp (ALINUX3-SA-2022:0002)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (236628). Similar entries are available at VDB-155877, VDB-155876, VDB-155874 and VDB-155873. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Remote Access Software

Name

FreeRDP

Version

License

open-source

Website

Product: https://github.com/FreeRDP/FreeRDP/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 236628
Nessus Name: Alibaba Cloud Linux 3 : 0002: freerdp (ALINUX3-SA-2022:0002)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/30/2020 🔍
05/29/2020 +60 days 🔍
05/30/2020 +1 days 🔍
05/19/2025 +1815 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-11087 (🔍)
GCVE (CVE): GCVE-0-2020-11087
GCVE (VulDB): GCVE-100-155875
See also: 🔍

Entryinfo

Created: 05/30/2020 09:20
Updated: 05/19/2025 21:24
Changes: 05/30/2020 09:20 (38), 05/30/2020 09:25 (11), 10/20/2020 21:05 (1), 10/20/2020 21:09 (1), 05/19/2025 21:24 (18)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.