Zoom Client up to 5.0.4 Sharing Service uncontrolled search path

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.
6.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Zoom Client up to 5.0.4. Affected by this issue is some unknown functionality of the component Sharing Service. Executing a manipulation can lead to uncontrolled search path. This vulnerability is tracked as CVE-2020-9767. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability has been found in Zoom Client up to 5.0.4 (Unified Communication Software) and classified as critical. This vulnerability affects some unknown functionality of the component Sharing Service. The manipulation with an unknown input leads to a uncontrolled search path vulnerability. The CWE definition for the vulnerability is CWE-427. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability related to Dynamic-link Library (“DLL�) loading in the Zoom Sharing Service would allow an attacker who had local access to a machine on which the service was running with elevated privileges to elevate their system privileges as well through use of a malicious DLL. Zoom addressed this issue, which only applies to Windows users, in the 5.0.4 client release.

The weakness was disclosed 08/14/2020 (Website). The advisory is shared for download at support.zoom.us. This vulnerability was named CVE-2020-9767 since 03/02/2020. The attack needs to be approached locally. A single authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/16/2020). The MITRE ATT&CK project declares the attack technique as T1574.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Uncontrolled search path
CWE: CWE-427 / CWE-426
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/02/2020 🔍
08/14/2020 +165 days 🔍
08/16/2020 +2 days 🔍
11/10/2020 +86 days 🔍

Sourcesinfo

Advisory: support.zoom.us
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-9767 (🔍)
GCVE (CVE): GCVE-0-2020-9767
GCVE (VulDB): GCVE-100-159952

Entryinfo

Created: 08/16/2020 08:38
Updated: 11/10/2020 07:30
Changes: 08/16/2020 08:38 (37), 08/16/2020 08:43 (18), 11/10/2020 07:30 (1)
Complete: 🔍
Cache ID: 216::103

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