Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.6, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from squid-cache organizations running these solutions should prioritize assessment and patching.
Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2023-12-14T18:15:45.070
2024-11-21T08:36:47.383
Modified
CVSSv3.1: 8.6 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | squid-cache | squid | ≤ 5.9 | Yes |
| Application | squid-cache | squid | ≤ 6.5 | Yes |
| Application | squid-cache | squid | 2.6 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
| Application | squid-cache | squid | 2.7 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For squid-cache's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.