Description Preview
A critical vulnerability (CVE-2020-27847) exists in the SAML connector of the github.com/dexidp/dex library that allows attackers to bypass SAML authentication. This security flaw affects all versions of Dex prior to 2.27.0, posing significant risks to confidentiality, integrity, and system availability for affected systems.
Overview
The vulnerability exists in the SAML connector component of the Dex identity service, which is widely used for authentication in Kubernetes and other systems. The flaw specifically impacts how Dex processes SAML signature validation, allowing malicious actors to bypass authentication controls entirely. When exploited, attackers can gain unauthorized access to protected resources and potentially compromise the entire authentication system. This vulnerability is particularly concerning for organizations using Dex for single sign-on (SSO) implementations, as it undermines the fundamental security guarantees of the SAML protocol.
Remediation
To address this vulnerability, organizations should take the following actions:
- Upgrade to Dex version 2.27.0 or later immediately, which contains the security patch for this vulnerability.
- If immediate upgrading is not possible, consider implementing additional authentication layers or temporarily disabling SAML authentication until the upgrade can be completed.
- Monitor authentication logs for any suspicious activity that might indicate exploitation attempts.
- Perform a security audit to identify any potential unauthorized access that might have occurred prior to patching.
- Review and update security configurations for Dex deployments following the latest security best practices.
References
- GitHub Security Advisory: https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
- Red Hat Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1907732
- Mattermost Vendor Advisory: https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
- Dex GitHub Repository: https://github.com/dexidp/dex
- MITRE CVE Entry: CVE-2020-27847
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
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Retail TradeRetail Trade
- 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
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
