CVE-2021-35209: SSRF
First published: Fri Jul 02 2021(Updated: )
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).
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zimbra Collaboration | >=8.8<8.8.15 | |
| Zimbra Collaboration | =8.8.15 | |
| Zimbra Collaboration | =8.8.15-p1 | |
| Zimbra Collaboration | =8.8.15-p10 | |
| Zimbra Collaboration | =8.8.15-p11 | |
| Zimbra Collaboration | =8.8.15-p12 | |
| Zimbra Collaboration | =8.8.15-p13 | |
| Zimbra Collaboration | =8.8.15-p14 | |
| Zimbra Collaboration | =8.8.15-p15 | |
| Zimbra Collaboration | =8.8.15-p16 | |
| Zimbra Collaboration | =8.8.15-p17 | |
| Zimbra Collaboration | =8.8.15-p18 | |
| Zimbra Collaboration | =8.8.15-p19 | |
| Zimbra Collaboration | =8.8.15-p2 | |
| Zimbra Collaboration | =8.8.15-p3 | |
| Zimbra Collaboration | =8.8.15-p4 | |
| Zimbra Collaboration | =8.8.15-p5 | |
| Zimbra Collaboration | =8.8.15-p6 | |
| Zimbra Collaboration | =8.8.15-p7 | |
| Zimbra Collaboration | =8.8.15-p8 | |
| Zimbra Collaboration | =8.8.15-p9 | |
| Zimbra Collaboration | =9.0.0 | |
| Zimbra Collaboration | =9.0.0-p1 | |
| Zimbra Collaboration | =9.0.0-p10 | |
| Zimbra Collaboration | =9.0.0-p11 | |
| Zimbra Collaboration | =9.0.0-p12 | |
| Zimbra Collaboration | =9.0.0-p2 | |
| Zimbra Collaboration | =9.0.0-p3 | |
| Zimbra Collaboration | =9.0.0-p4 | |
| Zimbra Collaboration | =9.0.0-p5 | |
| Zimbra Collaboration | =9.0.0-p6 | |
| Zimbra Collaboration | =9.0.0-p7 | |
| Zimbra Collaboration | =9.0.0-p8 | |
| Zimbra Collaboration | =9.0.0-p9 |
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Reference Links
Frequently Asked Questions
What is the vulnerability identified as CVE-2021-35209?
CVE-2021-35209 is an issue 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.
What is the severity of CVE-2021-35209?
The severity of CVE-2021-35209 is critical, with a CVSS score of 9.8.
How does CVE-2021-35209 affect Zimbra Collaboration Suite?
CVE-2021-35209 allows the value of the X-Host header to overwrite the value of the Host header in proxied requests in Zimbra Collaboration Suite.
Which versions of Zimbra Collaboration Suite are affected by CVE-2021-35209?
The vulnerability affects Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16.
How can I fix CVE-2021-35209 in Zimbra Collaboration Suite?
To fix CVE-2021-35209, upgrade Zimbra Collaboration Suite to version 8.8.15 Patch 23 or 9.0.0 Patch 16.
- collector/nvd-index
- agent/severity
- agent/references
- agent/weakness
- agent/author
- agent/type
- agent/event
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/zimbra
- canonical/zimbra collaboration
- version/zimbra collaboration/8.8
- version/zimbra collaboration/8.8.15
- version/zimbra collaboration/8.8.15-p1
- version/zimbra collaboration/8.8.15-p10
- version/zimbra collaboration/8.8.15-p11
- version/zimbra collaboration/8.8.15-p12
- version/zimbra collaboration/8.8.15-p13
- version/zimbra collaboration/8.8.15-p14
- version/zimbra collaboration/8.8.15-p15
- version/zimbra collaboration/8.8.15-p16
- version/zimbra collaboration/8.8.15-p17
- version/zimbra collaboration/8.8.15-p18
- version/zimbra collaboration/8.8.15-p19
- version/zimbra collaboration/8.8.15-p2
- version/zimbra collaboration/8.8.15-p3
- version/zimbra collaboration/8.8.15-p4
- version/zimbra collaboration/8.8.15-p5
- version/zimbra collaboration/8.8.15-p6
- version/zimbra collaboration/8.8.15-p7
- version/zimbra collaboration/8.8.15-p8
- version/zimbra collaboration/8.8.15-p9
- version/zimbra collaboration/9.0.0
- version/zimbra collaboration/9.0.0-p1
- version/zimbra collaboration/9.0.0-p10
- version/zimbra collaboration/9.0.0-p11
- version/zimbra collaboration/9.0.0-p12
- version/zimbra collaboration/9.0.0-p2
- version/zimbra collaboration/9.0.0-p3
- version/zimbra collaboration/9.0.0-p4
- version/zimbra collaboration/9.0.0-p5
- version/zimbra collaboration/9.0.0-p6
- version/zimbra collaboration/9.0.0-p7
- version/zimbra collaboration/9.0.0-p8
- version/zimbra collaboration/9.0.0-p9