Description Preview
A vulnerability in SonicWall SSO-agent's default configuration allows attackers to capture password hashes of privileged users through NetAPI probing. This can potentially force the SSO Agent to authenticate, enabling attackers to bypass firewall access controls and gain unauthorized network access.
Overview
The vulnerability (CVE-2020-5148) affects the SonicWall Single Sign-On (SSO) agent which is used to authenticate users to network resources. In its default configuration, the SSO-agent uses NetAPI to probe associated IP addresses in the network. This client probing method creates a security weakness where an attacker can intercept and capture the password hash of privileged users. By capturing these hashes, an attacker could potentially force the SSO Agent to authenticate, effectively bypassing firewall access controls and gaining unauthorized access to protected resources. This vulnerability is classified as CWE-287 (Improper Authentication).
Remediation
Organizations using SonicWall SSO-agent should:
- Update to the latest version of the SonicWall SSO-agent as recommended by SonicWall.
- Change the default configuration to disable NetAPI probing if possible.
- Implement network segmentation to limit the exposure of the SSO-agent.
- Monitor network traffic for suspicious authentication attempts.
- Follow SonicWall's security advisory (SNWLID-2021-0003) for specific patching instructions and configuration changes.
- Consider implementing additional authentication mechanisms as a defense-in-depth measure.
References
- SonicWall Security Advisory: https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0003
- MITRE CWE-287 (Improper Authentication): https://cwe.mitre.org/data/definitions/287.html
- CVE-2020-5148 National Vulnerability Database entry
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.
- ManufacturingManufacturing: Low
- Accommodation & Food ServicesAccommodation & Food Services: Low
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services: Low
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting: Low
- Arts, Entertainment & RecreationArts, Entertainment & Recreation: Low
- ConstructionConstruction: Low
- Educational ServicesEducational Services: Low
- Finance and InsuranceFinance and Insurance: Low
- Health Care & Social AssistanceHealth Care & Social Assistance: Low
- InformationInformation: Low
- Management of Companies & EnterprisesManagement of Companies & Enterprises: Low
- MiningMining: Low
- Other Services (except Public Administration)Other Services (except Public Administration): Low
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services: Low
- Public AdministrationPublic Administration: Low
- Real Estate Rental & LeasingReal Estate Rental & Leasing: Low
- Retail TradeRetail Trade: Low
- Transportation & WarehousingTransportation & Warehousing: Low
- UtilitiesUtilities: Low
- Wholesale TradeWholesale Trade: Low
