Description Preview
Overview
Paranoidhttp is a Go library designed to prevent Server-Side Request Forgery (SSRF) attacks by filtering out requests to private IP addresses. However, in versions prior to 0.3.0, there was a security flaw in the implementation. While the library correctly blocked requests to the IPv4 localhost address (127.0.0.1), it failed to recognize that the IPv6 notation [::] also refers to localhost. This oversight created a security bypass that could allow attackers to make requests to internal services by using the IPv6 localhost notation, effectively circumventing the SSRF protection mechanism. This vulnerability is classified as CWE-918 (Server-Side Request Forgery).
Remediation
To address this vulnerability, users should upgrade to Paranoidhttp version 0.3.0 or later, which properly identifies and blocks the IPv6 localhost address [::]. The fix was implemented in commit 07f671da14ce63a80f4e52432b32e8d178d75fd3, which updated the filtering mechanism to recognize all forms of localhost addresses, including IPv6 notation.
If immediate upgrading is not possible, organizations should implement additional network-level controls to restrict outbound connections from servers using the vulnerable library version. Additionally, consider implementing secondary validation of URLs before passing them to the HTTP client.
References
- Paranoidhttp Changelog for v0.3.0: https://github.com/hakobe/paranoidhttp/blob/master/CHANGELOG.md#v030-2023-01-19
- Fix Commit: https://github.com/hakobe/paranoidhttp/commit/07f671da14ce63a80f4e52432b32e8d178d75fd3
- Comparison between v0.2.0 and v0.3.0: https://github.com/hakobe/paranoidhttp/compare/v0.2.0...v0.3.0
- CWE-918: Server-Side Request Forgery (SSRF): https://cwe.mitre.org/data/definitions/918.html
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.
- 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
