An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting).
                
            References
                    | Link | Resource | 
|---|---|
| https://blog.sonarsource.com/zimbra-webmail-compromise-via-email | Exploit Third Party Advisory | 
| https://wiki.zimbra.com/wiki/Security_Center | Release Notes Vendor Advisory | 
| https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 | Release Notes Vendor Advisory | 
| https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 | Release Notes Vendor Advisory | 
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | Vendor Advisory | 
Configurations
                    Configuration 1 (hide)
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History
                    No history.
Information
                Published : 2021-07-02 19:15
Updated : 2021-09-20 18:56
NVD link : CVE-2021-35209
Mitre link : CVE-2021-35209
CVE.ORG link : CVE-2021-35209
JSON object : View
Products Affected
                zimbra
- collaboration
CWE
                
                    
                        
                        CWE-918
                        
            Server-Side Request Forgery (SSRF)
