Information Disclosure Vulnerability in Squid Caching Proxy

CVE-2025-62168

What is CVE-2025-62168?

CVE-2025-62168 is an information disclosure vulnerability affecting the Squid Caching Proxy, a widely used open-source proxy server designed to optimize web traffic through caching. This vulnerability arises from a failure to properly redact HTTP authentication credentials during error handling in versions prior to 7.2 of Squid. As a result, it enables potential remote attackers to access sensitive information, specifically authentication tokens and credentials utilized for verifying users in trusted client interactions. The implications are particularly severe for organizations using Squid in backend operations for load balancing, as the exposure of internal security credentials can be exploited to compromise web applications and their users. This weakness can be problematic for organizations that rely heavily on Squid for managing web requests, potentially undermining the integrity and confidentiality of their operations.

Potential impact of CVE-2025-62168

1. Unauthorized Access to Credentials: The vulnerability allows scripts to bypass security measures, potentially exposing security tokens or authentication credentials to unauthorized users. This can lead to malicious exploitation of internal services.

2. Increased Risk of Data Breaches: With the possibility of leaked credentials, an organization may face significant risks, including unauthorized access to critical data and systems, leading to data breaches that could have severe regulatory and financial repercussions.

3. Compromise of Web Application Integrity: Since Squid can be used for backend load balancing, access to its sensitive authentication mechanisms can lead to broader compromises within the web application's architecture, putting the entire framework at risk. Without adequate protections in place, such vulnerabilities can enable further attacks, including session hijacking and impersonation of trusted users.

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