CVE-2021-35209
Zimbra ProxyServlet Host Header Overwrite Vulnerability
Description
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).
INFO
Published Date :
July 2, 2021, 7:15 p.m.
Last Modified :
Sept. 20, 2021, 6:56 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-35209.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-35209 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-35209 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Sep. 20, 2021
Action Type Old Value New Value Removed CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://blog.sonarsource.com/zimbra-webmail-compromise-via-email No Types Assigned https://blog.sonarsource.com/zimbra-webmail-compromise-via-email Exploit, Third Party Advisory Removed CWE NIST CWE-601 Added CWE NIST CWE-918 -
CVE Modified by [email protected]
Aug. 02, 2021
Action Type Old Value New Value Added Reference https://blog.sonarsource.com/zimbra-webmail-compromise-via-email [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 08, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://wiki.zimbra.com/wiki/Security_Center No Types Assigned https://wiki.zimbra.com/wiki/Security_Center Release Notes, Vendor Advisory Changed Reference Type https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 No Types Assigned https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 Release Notes, Vendor Advisory Changed Reference Type https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 No Types Assigned https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 Release Notes, Vendor Advisory Changed Reference Type https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories No Types Assigned https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories Vendor Advisory Added CWE NIST CWE-601 Added CPE Configuration OR *cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* versions from (including) 8.8 up to (excluding) 8.8.15 *cpe:2.3:a:zimbra:collaboration:8.8.15:-:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p1:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p10:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p11:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p12:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p13:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p14:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p15:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p16:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p17:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p18:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p19:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p2:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p3:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p4:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p5:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p6:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p7:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p8:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:8.8.15:p9:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:-:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p1:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p10:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p11:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p12:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p2:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p3:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p4:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p5:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p6:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p7:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p8:*:*:*:*:*:* *cpe:2.3:a:zimbra:collaboration:9.0.0:p9:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-35209 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-35209
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.73 }} 0.07%
score
0.80324
percentile