CVE-2007-0892 in phpMyVisites
Summary
by MITRE
CRLF injection vulnerability in phpMyVisites before 2.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the url parameter, when the pagename parameter begins with "FILE:".
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Analysis
by VulDB Data Team • 08/19/2018
The vulnerability described in CVE-2007-0892 represents a critical CRLF injection flaw in phpMyVisites versions prior to 2.2 that enables remote attackers to manipulate HTTP headers and execute HTTP response splitting attacks. This security weakness stems from inadequate input validation and sanitization of user-supplied data within the application's parameter handling mechanisms. The vulnerability specifically manifests when the pagename parameter contains the prefix "FILE:" and the url parameter includes CRLF sequences, creating a pathway for malicious header injection.
The technical exploitation of this vulnerability occurs through the manipulation of HTTP request parameters where attackers can inject carriage return line feed sequences into the url parameter. When the application processes these parameters without proper sanitization, the injected CRLF characters allow attackers to insert arbitrary HTTP headers into the response. This creates a condition where the server response can be split into multiple responses, enabling attackers to inject malicious content, perform session hijacking, or redirect users to malicious websites. The vulnerability operates at the application layer and specifically targets the HTTP protocol implementation within phpMyVisites.
The operational impact of this vulnerability extends beyond simple header injection, as it enables sophisticated attack vectors that can compromise user sessions and data integrity. Attackers can leverage HTTP response splitting to perform cache poisoning attacks, where they manipulate web caches to serve malicious content to other users. Additionally, the vulnerability can facilitate cross-site scripting attacks by injecting malicious content into HTTP headers that are subsequently processed by web browsers. The attack surface is particularly concerning because it allows remote code execution in certain scenarios, especially when combined with other vulnerabilities or when the application is deployed in environments with insufficient security controls.
Mitigation strategies for this vulnerability require immediate patching of phpMyVisites to version 2.2 or later, which includes proper input validation and sanitization of HTTP parameters. Organizations should implement comprehensive input validation mechanisms that filter out or escape CRLF characters from user-supplied data before processing. The implementation of web application firewalls can provide additional protection layers to detect and block malicious CRLF sequences in HTTP requests. Security configurations should include strict header validation and sanitization routines that prevent the injection of unauthorized HTTP headers. This vulnerability aligns with CWE-113, which describes improper neutralization of CRLF sequences in HTTP headers, and maps to ATT&CK technique T1566 for credential access through HTTP response manipulation. Regular security assessments and input validation testing should be conducted to ensure that similar vulnerabilities are not present in other application components or third-party libraries.