CVE Vulnerability

CVE-2021-34823

The ON24 ScreenShare (aka DesktopScreenShare.app) plugin before 2.0 for macOS allows remote file access via its built-in HTTP server. This allows unauthenticated remote users to retrieve files accessible to the logged-on macOS user. When a remote user sends a crafted HTTP request to the server, it triggers a code path that will download a configuration file from a specified remote machine over HTTP. There is an XXE flaw in processing of this configuration file that allows reading local (to macOS) files and uploading them to remote machines.

6.4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

9.1 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=29105 Third Party Advisory
https://www.trustwave.com/en-us/resources/security-resources/security-advisories/ Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:on24:screenshare:*:*:*:*:*:macos:*:*
Information

Published : 2021-08-13 05:15

Updated : 2021-08-31 02:25

NVD link : CVE-2021-34823

Mitre link : CVE-2021-34823

Products Affected
No products.
CWE
CWE-611

Improper Restriction of XML External Entity Reference