Description Preview
Zimbra Collaboration Suite (ZCS) versions prior to 8.8.15 Patch 7 contain a Server-Side Request Forgery (SSRF) vulnerability when the WebEx zimlet is installed and zimlet JSP is enabled. This vulnerability allows attackers to make server-side requests to internal resources that should not be accessible, potentially leading to unauthorized access to internal systems, data exposure, or further network penetration.
Overview
This vulnerability (CVE-2020-7796) is classified as CWE-918 (Server-Side Request Forgery). When the WebEx zimlet is installed and JSP functionality is enabled in Zimbra Collaboration Suite, attackers can manipulate the server into making unauthorized requests to internal or external systems. The SSRF vulnerability could allow attackers to:
- Bypass network security controls
- Access internal services behind firewalls
- Scan internal networks
- Retrieve sensitive information from internal systems
- Potentially execute further attacks against internal systems
The vulnerability affects all Zimbra Collaboration Suite installations prior to version 8.8.15 Patch 7 that have the WebEx zimlet installed and zimlet JSP enabled.
Remediation
To address this vulnerability, organizations should take the following actions:
- Update Zimbra Collaboration Suite to version 8.8.15 Patch 7 or later.
- If immediate patching is not possible:
- Consider disabling the WebEx zimlet temporarily
- Disable zimlet JSP functionality if not required
- Implement network-level controls to restrict outbound connections from the Zimbra server
- After patching, verify that the vulnerability has been addressed by testing the system.
- Review server logs for any signs of exploitation attempts.
- Implement general security best practices:
- Keep all Zimbra components updated
- Use network segmentation to isolate critical systems
- Implement proper access controls
- Monitor for unusual network traffic or server behavior
References
- Zimbra Release Notes and Advisory: https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7
- CWE-918 (Server-Side Request Forgery): https://cwe.mitre.org/data/definitions/918.html
- MITRE CVE Entry: CVE-2020-7796
- Zimbra Security Updates: https://wiki.zimbra.com/wiki/Security_Center
Industry ExposureMost to leastThis section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
- Accommodation & Food ServicesAccommodation & Food Services
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting
- Arts, Entertainment & RecreationArts, Entertainment & Recreation
- ConstructionConstruction
- Educational ServicesEducational Services
- Finance and InsuranceFinance and Insurance
- Health Care & Social AssistanceHealth Care & Social Assistance
- InformationInformation
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- ManufacturingManufacturing
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Retail TradeRetail Trade
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
