CVE-2017-2666: debian debian_linux HTTP Request/Response Smuggling

Vulnerability summary

CVE-2017-2666 is a medium (CVSS 6.5) HTTP Request/Response Smuggling vulnerability in debian debian_linux. EPSS estimates a 3.09% chance of exploitation in the next 30 days, higher than 87.5% of scored vulnerabilities.

Timeline

1. 27-07-2018
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

• CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.