XML External Entity injection in Zimbra Collaboration - CVE-2019-9670
Published: April 16, 2021 / Updated: August 16, 2022
Vulnerability identifier: #VU52298
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-9670
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input within the mailboxd component. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
Affected software
Zimbra Collaboration
How to mitigate CVE-2019-9670
Install updates from vendor's website.
Zimbra Collaboration - update to 8.7.11 Patch 10
Links to Public Exploits and PoC-codes
- Exploit #8254 - zaber (?️ Yet another CVE-2019-9670 exploit, but in Golang.) (August 16, 2022)
- Exploit #8089 - arbimz (? Arbimz is a python tool created to exploit the vulnerability on Zimbra assigned as CVE-2019-9670.) (June 29, 2022)
- Exploit #5302 - Zimbra-RCE (Zimbra RCE PoC - CVE-2019-9670 XXE/SSRF) (April 16, 2021)
External References
- http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
- http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
- https://bugzilla.zimbra.com/show_bug.cgi?id=109129
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://www.exploit-db.com/exploits/46693/