CVE-2007-4400 in Konversation
Summary
by MITRE
CRLF injection vulnerability in the included media script in Konversation allows user-assisted remote attackers to execute arbitrary IRC commands via CRLF sequences in the name of the song in a .mp3 file.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/08/2019
The CVE-2007-4400 vulnerability represents a critical cross-site scripting and command injection flaw within the Konversation IRC client application. This vulnerability specifically targets the media script component that processes metadata from audio files, particularly mp3 files, during playback. The flaw enables malicious actors to inject carriage return line feed sequences into the song name field, creating a pathway for remote code execution within the IRC client environment. The vulnerability operates through a classic CRLF injection attack vector where attacker-controlled data containing line termination characters is processed without proper sanitization.
The technical implementation of this vulnerability stems from insufficient input validation within Konversation's media script handling mechanism. When the application processes mp3 files containing specially crafted metadata, particularly within the title or song name field, it fails to properly escape or sanitize CRLF characters. This oversight allows an attacker to inject malicious sequences that can be interpreted by the IRC client's command processing engine. The vulnerability requires user interaction to be exploited effectively, as the victim must initiate playback of a maliciously crafted mp3 file containing the injected CRLF sequences. This user-assisted nature reduces the attack surface but does not eliminate the severity of the potential impact.
The operational impact of CVE-2007-4400 extends beyond simple data corruption or display issues. When successfully exploited, the vulnerability enables attackers to inject arbitrary IRC commands directly into the client's command processing pipeline, potentially allowing for unauthorized channel joining, message broadcasting, or even command execution within the IRC network context. This capability could lead to session hijacking, unauthorized communication, or further network infiltration through the IRC infrastructure. The vulnerability specifically affects Konversation versions prior to 1.2.2, making it a significant concern for users operating older installations. The attack scenario typically involves an attacker creating a malicious mp3 file with crafted metadata that, when played by a victim's Konversation client, triggers the CRLF injection and subsequent command execution.
From a security standards perspective, this vulnerability aligns with CWE-117, which describes improper output neutralization for logs, and CWE-74, which addresses improper neutralization of special elements in output used by a downstream component. The attack pattern closely follows ATT&CK techniques related to command and control through client-side exploitation, specifically mapping to T1059 for command and scripting interpreter usage and T1071 for application layer protocols. The vulnerability demonstrates the critical importance of input validation and output encoding in client-side applications that process untrusted media metadata. Mitigation strategies include immediate upgrading to Konversation version 1.2.2 or later, implementing strict input validation for media file metadata, and deploying network-level filtering to prevent the delivery of potentially malicious media files. Organizations should also consider implementing user education programs to raise awareness about the risks of playing untrusted media content and establish robust patch management procedures to address similar vulnerabilities in other client applications.