Paper/Archive/CVE-2021-35209

CVE-2021-35209

mitre — 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 befor…

EPSS 3%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (NVD)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 87.3.873 × 2017.5 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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).

Affected

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refwiki.zimbra.com/wiki/Zimbra_Security_Advisories refwiki.zimbra.com/wiki/Security_Center refwiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 refwiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 refblog.sonarsource.com/zimbra-webmail-compromise-via-email