CVE-2021-34823

· CRITICALModified

← All CVEs

CVSS v3.1

9.1

EPSS

1.98%

Published

Aug 13, 2021

Modified

Nov 21, 2024

Public PoC / Exploit (1)

All weaponized →

TrickestTrickest PoC index

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-611

Affected Products (1)

on24 · screenshare (up to 2.0)vulnerable

References (4)

https://www.trustwave.com/en-us/resources/security-resources/security-advisories/

Third Party Advisory

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

https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=29105

Third Party Advisory

KEV Catalog EPSS Scores Vendors All CVEs