PT-2021-22441 · Owncast · Owncast

Gabek · Published 2021-12-14 · Updated 2024-08-21 · CVE-2021-39183

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L

Name of the Vulnerable Software and Affected Versions Owncast versions prior to 0.0.9

Description The issue concerns the execution of inline scripts when Javascript is parsed via a paste action in the chat server. This can lead to the execution of malicious scripts. The problem is resolved by blocking unsafe-inline Content Security Policy and specifying the script-src. Additionally, setting worker-src to blob is required for the video player.

Recommendations For versions prior to 0.0.9, update to version 0.0.9 to patch the issue by blocking unsafe-inline Content Security Policy and specifying the script-src. Ensure the worker-src is set to blob for the video player.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-39183

GHSA-2HFJ-CXW7-G45P

GO-2022-0291

Affected Products

Owncast

References · 7

• 🔥 https://github.com/owncast/owncast/security/advisories/GHSA-2hfj-cxw7-g45p · Exploit
• https://osv.dev/vulnerability/GO-2022-0291 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-39183 · Security Note
• https://osv.dev/vulnerability/GHSA-2hfj-cxw7-g45p · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39183 · Vendor Advisory
• https://github.com/owncast/owncast · Note
• https://t.me/cibsecurity/33967 · Telegram Post