CVE-2022-0508 in peertube
Summary
by MITRE • 02/08/2022
Server-Side Request Forgery (SSRF) in GitHub repository chocobozzz/peertube prior to f33e515991a32885622b217bf2ed1d1b0d9d6832
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Analysis
by VulDB Data Team • 02/12/2022
The vulnerability identified as CVE-2022-0508 represents a critical server-side request forgery flaw discovered in the GitHub repository hosted by chocobozzz/peertube. This issue affects versions prior to the commit f33e515991a32885622b217bf2ed1d1b0d9d6832, where the application fails to properly validate and sanitize user-supplied input that is subsequently used to construct HTTP requests to remote servers. The vulnerability stems from insufficient restrictions on the URLs or endpoints that the application can access, allowing an attacker to manipulate the application's behavior by redirecting requests to internal or external systems that should otherwise be inaccessible.
The technical implementation of this flaw occurs within the application's handling of remote resource requests, where user-provided data is directly incorporated into HTTP client calls without adequate validation mechanisms. This allows an attacker to craft malicious input that causes the server to make unintended requests to internal network services, external domains, or even localhost endpoints. The vulnerability can be exploited to bypass network segmentation, access internal services that are not directly exposed to the internet, or perform reconnaissance activities by probing internal systems that would normally be protected by firewalls or access controls.
From an operational impact perspective, this SSRF vulnerability poses significant risks to organizations deploying PeerTube instances, as it enables attackers to potentially access sensitive internal resources, extract confidential information, or even escalate privileges within the network environment. The vulnerability can be particularly dangerous in containerized or cloud environments where internal services may be exposed through the application's SSRF capabilities. The attack surface extends beyond simple data exfiltration to include potential privilege escalation, lateral movement, and further exploitation of other vulnerabilities within the internal network infrastructure.
Security professionals should consider this vulnerability in the context of the Common Weakness Enumeration framework, where it maps directly to CWE-918, which describes Server-Side Request Forgery vulnerabilities. The ATT&CK framework categorizes this as a technique that enables initial access and lateral movement through network reconnaissance and service enumeration activities. Organizations should implement comprehensive input validation controls, employ network segmentation strategies, and deploy proper access controls to prevent unauthorized access to internal services. Additionally, the vulnerability highlights the importance of implementing proper HTTP request handling mechanisms, including URL validation, protocol restrictions, and the use of allowlists for permitted external endpoints to prevent unauthorized resource access.
Mitigation strategies should include immediate patching to the affected version, implementing strict input validation for all user-supplied data used in HTTP requests, and deploying network-level controls that restrict outbound connections from the application server. Organizations should also consider implementing web application firewalls, monitoring for suspicious outbound requests, and conducting regular security assessments to identify similar vulnerabilities in other components of their infrastructure. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for comprehensive security testing throughout the software development lifecycle to prevent such dangerous flaws from reaching production environments.