CVE-2024-45336: Medium Vulnerability in HTTP Client

CVE-2024-45336 describes a medium-severity vulnerability where the HTTP client drops sensitive headers after following a cross-domain redirect. For example, a request to a.com/ containing an Authorization header which is redirected to b.com/ will not send that header to b.com. This behavior could lead to unauthorized access if an attacker can control the redirect process.

The CVSS score assigned to this vulnerability is 6.1, indicating medium severity. This score reflects the potential impact on confidentiality and integrity due to the mishandling of sensitive information. Organizations should be aware that if sensitive data, like authorization headers, are inadvertently exposed, it may lead to severe security implications.

Risk to organizations includes the possibility of unauthorized access to resources, particularly when sensitive headers are dropped during cross-domain redirects. The vulnerability status is currently marked as 'Awaiting Analysis', and there are no known exploits at this time. However, the potential for exploitation exists, and organizations should take this vulnerability seriously.

Organizations should prioritize patching immediately to mitigate the risk associated with CVE-2024-45336. As this vulnerability could impact multiple applications that utilize HTTP clients, timely remediation is essential.

Vulnerability Details

The vulnerability allows the HTTP client to drop sensitive headers after following a cross-domain redirect. Specifically, a request may contain headers such as Authorization that are not sent to the redirected domain. If a subsequent same-domain redirect occurs, the headers are incorrectly restored, potentially leading to exposure of sensitive information.

The CVSS 3.1 vector string for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, resulting in a base score of 6.1. The attack vector is classified as NETWORK, with low attack complexity, no privileges required, and user interaction needed for exploitation. The impacts on confidentiality and integrity are deemed low, while availability is not affected.

Publication Date: January 28, 2025

Technical Analysis

The root cause of this vulnerability lies in the HTTP client's handling of headers during cross-domain redirects. When a client receives a redirect to a different domain, it fails to transmit sensitive headers, which could lead to exposure of those headers inappropriately under certain conditions.

The attack vector for this vulnerability is network-based. An attacker with the ability to manipulate redirect responses could exploit this vulnerability. The attack complexity is low, as it does not require advanced skills or specific configurations. No privileges are required to exploit this vulnerability, but user interaction is necessary, as the user must trigger the HTTP request.

The impact on confidentiality is low, as sensitive headers like Authorization are dropped, but there is a potential for exploitation if the attacker can redirect requests. The integrity impact is also low, as there is no modification of data through this vulnerability. Availability is unaffected.

Risk & Impact Analysis

Real-world deployment risk includes the possibility of unauthorized access to sensitive data if the HTTP client is misconfigured or used improperly. Organizations using this HTTP client should evaluate their environments and assess the potential for exploitation through cross-domain redirects.

This vulnerability matters to organizations that rely on web applications interacting with multiple domains. The blast radius potential is significant, as many applications may inadvertently expose sensitive information to unauthorized domains, potentially leading to data breaches or unauthorized access.

Organizations should address this vulnerability in their priority patch cycle. Given the current exploitability status and the potential for unauthorized access, timely action is warranted.

Exploitation Status

Affected Versions

Details regarding specific affected versions are not available, but organizations should ensure that they are using the latest updates from their HTTP client providers to mitigate this vulnerability.

Mitigation & Remediation

Organizations should prioritize patching as soon as a fix becomes available to address this vulnerability. In the meantime, it is advisable to review and implement best practices around cross-domain requests. This may include configuring HTTP clients to restrict the use of sensitive headers, especially during cross-domain redirects.

Implementing strict Content Security Policy (CSP) headers can also mitigate some of the risks associated with cross-domain redirects. Organizations may benefit from engaging in penetration testing to identify potential weaknesses in their HTTP handling.

Detection Guidance

To detect potential exploitation of this vulnerability, organizations should monitor for unusual redirection patterns in their logs. Look for instances where sensitive headers are not included in expected requests, particularly during cross-domain interactions.

Additionally, behavioral anomalies in user sessions could indicate attempts to exploit this issue. Monitoring for signatures associated with unauthorized access attempts can aid in early detection.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2024-45336 highlights the importance of secure handling of sensitive headers in HTTP communications. This vulnerability represents a trend where misconfigurations or oversights in handling redirects can lead to significant security risks.

Security teams should take this as a lesson to review their cross-domain request policies and ensure that sensitive headers are adequately protected. Engaging in regular assessments, including penetration testing methodology, can help identify similar vulnerabilities in their systems.

A strategic defensive takeaway is to enforce strict policies on header handling for cross-domain requests, as well as to educate developers on secure coding practices that prevent such vulnerabilities.