CVE-2022-24739 is a security vulnerability identified in the Rudloff alltube application, an HTML front-end interface for youtube-dl, which is used to facilitate video downloading from YouTube and other platforms. The vulnerability affects versions prior to 3.0.3 and involves two related issues: an open redirect (CWE-601) and a potential Server-Side Request Forgery (SSRF) (CWE-918). The open redirect vulnerability allows an attacker to craft a specially designed HTML page that, when interacted with by a user, causes the application to redirect the user to an untrusted external URL. This can be exploited for phishing attacks, redirecting users to malicious sites under the attacker’s control. The SSRF vulnerability arises depending on the configuration of alltube, specifically if the 'stream' option is enabled. SSRF allows an attacker to make the server perform unauthorized HTTP requests to internal or external resources, potentially exposing sensitive internal network information or enabling further attacks. However, the SSRF risk is mitigated by the fact that the 'stream' option is disabled by default, limiting the exposure. The vulnerability was addressed in version 3.0.3 of alltube, which includes fixes to prevent these attack vectors. There are no known exploits in the wild reported, and no CVSS score has been assigned to this vulnerability. The attack requires the victim to interact with a maliciously crafted HTML page, implying user interaction is necessary for exploitation. No authentication is required to trigger the vulnerability, increasing the risk surface for exposed installations. The scope of affected systems is limited to installations of alltube versions prior to 3.0.3 that are accessible to potential attackers, especially those with the 'stream' option enabled for SSRF exploitation.

For European organizations using alltube as a front-end for youtube-dl, this vulnerability poses moderate risks. The open redirect can be leveraged in social engineering or phishing campaigns, potentially leading to credential theft or malware delivery if users are redirected to malicious sites. The SSRF vulnerability, while conditional on configuration, could allow attackers to probe internal networks, access internal services, or exfiltrate data, which is particularly concerning for organizations with sensitive internal infrastructure. Given that alltube is a niche tool primarily used for media downloading, the overall impact is likely limited to organizations or individuals relying on it for content management or media workflows. However, if alltube is integrated into larger automated systems or internal tools, SSRF exploitation could lead to broader network reconnaissance or lateral movement. The requirement for user interaction reduces the likelihood of automated exploitation but does not eliminate risk, especially in environments where users may be targeted via phishing. The absence of known exploits suggests limited active threat but does not preclude future exploitation. Overall, the vulnerability could lead to confidentiality breaches (via SSRF), integrity risks (through phishing and redirection), and minor availability impacts if internal resources are targeted. European organizations should assess their use of alltube and the configuration of the 'stream' option to evaluate exposure.

1. Upgrade alltube to version 3.0.3 or later immediately to apply the official patch that addresses both the open redirect and SSRF vulnerabilities. 2. Review and disable the 'stream' option in alltube configurations unless explicitly required, as this setting enables SSRF exploitation. 3. Implement strict input validation and sanitization on any user-supplied URLs or parameters within alltube or any integrated systems to prevent open redirect conditions. 4. Employ web application firewalls (WAFs) with rules to detect and block suspicious redirect patterns and SSRF attempts targeting internal resources. 5. Conduct user awareness training focused on phishing and social engineering risks, emphasizing caution when interacting with unexpected redirects or links. 6. Monitor network logs and application logs for unusual outbound requests originating from alltube servers, which could indicate SSRF exploitation attempts. 7. Restrict network access from alltube servers to only necessary external endpoints, using network segmentation and firewall rules to limit SSRF impact. 8. If alltube is used in automated workflows, implement additional validation layers or proxy controls to sanitize and verify URLs before processing. These measures go beyond generic advice by focusing on configuration hardening, network-level controls, and user education tailored to the specific nature of the vulnerability.