FreeRDP 2.0.0-beta1+android11 Authentication license_recv out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeRDP 2.0.0-beta1+android11. It has been rated as critical. The impacted element is the function license_recv of the component Authentication. The manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2017-2834. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FreeRDP 2.0.0-beta1+android11. This issue affects the function license_recv of the component Authentication. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An exploitable code execution vulnerability exists in the authentication functionality of FreeRDP 2.0.0-beta1+android11. A specially crafted server response can cause an out-of-bounds write resulting in an exploitable condition. An attacker can compromise the server or use a man in the middle attack to trigger this vulnerability.

The bug was discovered 07/24/2017. The weakness was disclosed 04/24/2018 by Tyler Bohan with Cisco Talos (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2017-2834 since 12/01/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 40 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102945 (openSUSE Security Update : freerdp (openSUSE-2017-992)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196871 (Ubuntu Security Notification for Freerdp Vulnerabilities (USN-3380-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (102945) and SecurityFocus (BID 99942†). The entries VDB-117048, VDB-117049, VDB-117050 and VDB-117051 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (Talos): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 102945
Nessus Name: openSUSE Security Update : freerdp (openSUSE-2017-992)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for remmina FEDORA-2017-ed31e1f941
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/01/2016 🔍
07/24/2017 +235 days 🔍
07/25/2017 +1 days 🔍
09/02/2017 +39 days 🔍
09/05/2017 +3 days 🔍
04/24/2018 +230 days 🔍
04/24/2018 +0 days 🔍
04/25/2018 +1 days 🔍
03/07/2023 +1777 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Tyler Bohan
Organization: Cisco Talos
Status: Not defined

CVE: CVE-2017-2834 (🔍)
GCVE (CVE): GCVE-0-2017-2834
GCVE (VulDB): GCVE-100-117047

OVAL: 🔍

SecurityFocus: 99942 - FreeRDP Multiple Denial of Service and Remote Code Execution Vulnerabilities

See also: 🔍

Entryinfo

Created: 04/25/2018 10:21
Updated: 03/07/2023 11:22
Changes: 04/25/2018 10:21 (76), 04/16/2020 11:53 (5), 03/07/2023 11:22 (14)
Complete: 🔍
Cache ID: 216::103

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