CVE-2020-12443
BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value can be a .pdf filename while the presFilename (mixed case) value has a ../ sequence. This can be leveraged for privilege escalation via a directory traversal to bigbluebutton.properties. NOTE: this issue exists because of an ineffective mitigation to CVE-2020-12112 in which there was an attempted fix within an NGINX configuration file, without considering that the relevant part of NGINX is case-insensitive.
- Affected products
- Bigbluebutton, Nginx
- Bigbluebutton
- < 2.2.6
- Fix
- Available
- CVSS 3.1
- 9.8 CRITICAL
- EPSS
- 3.6% (88th percentile)
- Weakness
- CWE-22
- NVD status
- Modified
- Published
- 2020-04-29
No indexed exploits for CVE-2020-12443 yet
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No exploit for CVE-2020-12443 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.