Description
BrightSign Digital Signage Diagnostic Web Server 8.2.26 and less contains an unauthenticated server-side request forgery vulnerability in the 'url' GET parameter of the Download Speed Test service. Attackers can specify external domains to bypass firewalls and perform network enumeration by forcing the application to make arbitrary HTTP requests to internal network hosts.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality (Vulnerable System)
None
Integrity (Vulnerable System)
Low
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
Low
Integrity (Subsequent System)
Low
Availability (Subsequent System)
Low
Affected products
Exploits & PoCs
- nucleiBrightSign Digital Signage 8.2.26 - Server-Side Request Forgeryby 0x_Akoko
References
- EXPLOIThttps://www.exploit-db.com/exploits/48843
- MISChttps://www.brightsign.biz
- MISChttps://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php
- MISChttps://github.com/zeroscience
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/brightsign-digital-signage-diagnostic-web-server-unauthenticated-ssrf