Vulnerability Report

CVE-2021-35209

Title: Zimbra Collaboration Server-Side Request Forgery (SSRF)

Server-Side Request Forgery (SSRF)

Proof Of Concept

No public PoC currently indexed for CVE-2021-35209.

CWE Category CWE-918

Published Date Jul 02, 2021

Modified Date Nov 21, 2024

Exploit Status Not Found

Score 9.8 CVSS v3.1

Exploit Probability (EPSS)

1.82%

Vulnerability Summary

CVE-2021-35209: 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).

Impacted Vendors

hummingbird 1

zimbra 1

Reference Links

https://blog.sonarsource.com/zimbra-webmail-compromise-via-email https://wiki.zimbra.com/wiki/Security_Center https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories https://blog.sonarsource.com/zimbra-webmail-compromise-via-email https://wiki.zimbra.com/wiki/Security_Center https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-35209 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

November 21, 2024 MODIFIED

Vulnerability data or affected products updated.

July 02, 2021 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.