Paper/Archive/CVE-2021-34823

CVE-2021-34823

mitre — The ON24 ScreenShare (aka DesktopScreenShare.app) plugin before 2.0 for macOS allows remote file access via its built-in HTTP server.

EPSS 2%CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (NVD)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 80.5.805 × 2016.1 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

reftrustwave.com/en-us/resources/security-resources/security-advisories reftrustwave.com/en-us/resources/security-resources/security-advisories/?fid=29105