CVE-2004-0258 in RealPlayer
Summary
by MITRE
Multiple buffer overflows in RealOne Player, RealOne Player 2.0, RealOne Enterprise Desktop, and RealPlayer Enterprise allow remote attackers to execute arbitrary code via malformed (1) .RP, (2) .RT, (3) .RAM, (4) .RPM or (5) .SMIL files.
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Analysis
by VulDB Data Team • 07/13/2025
The vulnerability described in CVE-2004-0258 represents a critical security flaw affecting multiple iterations of RealNetworks RealOne Player and RealPlayer Enterprise software products. This vulnerability manifests as multiple buffer overflows that occur when the affected media players process specially crafted media files with extensions including .RP, .RT, .RAM, .RPM, and .SMIL. The flaw exists within the parsing logic of these media players, where insufficient input validation and boundary checking allows maliciously formatted files to overwrite adjacent memory regions. These buffer overflow conditions create opportunities for remote code execution, making the vulnerability particularly dangerous as it can be exploited without user interaction once a malicious file is accessed.
The technical implementation of this vulnerability stems from improper handling of multimedia file formats within the RealPlayer software ecosystem. When these players encounter malformed files with the specified extensions, the parsing routines fail to properly validate the size and structure of incoming data before copying it into fixed-size memory buffers. This classic buffer overflow scenario occurs because the software does not adequately check the length of data being read from the media files against the allocated buffer space. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which allows attackers to overwrite return addresses and execute arbitrary code with the privileges of the affected process. The attack vector is particularly concerning as it requires no user interaction beyond opening the malicious file, making it suitable for drive-by download attacks and automated exploitation campaigns.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass significant risks for enterprise environments and individual users. Organizations utilizing RealOne Player or RealPlayer Enterprise software face potential compromise of their entire network infrastructure if attackers successfully exploit this vulnerability through malicious media files delivered via email attachments, web downloads, or compromised websites. The affected software products were widely deployed in enterprise settings, making the attack surface particularly large. Security researchers have documented this vulnerability as part of the broader ATT&CK framework under the technique of "Exploitation for Execution" where adversaries leverage software vulnerabilities to gain unauthorized code execution. The lack of user interaction requirements means that simply visiting a compromised website or opening a malicious email attachment could result in system compromise, potentially leading to data exfiltration, system takeover, or deployment of additional malware.
Mitigation strategies for CVE-2004-0258 focus on immediate software updates and operational security measures to reduce exposure. The primary recommendation involves applying patches released by RealNetworks that address the buffer overflow conditions in the affected media player versions. Organizations should implement network segmentation and access controls to limit exposure to potentially malicious media files, particularly in environments where these players are still in use. Security teams should consider disabling support for the vulnerable file formats entirely through configuration changes or by removing the affected software from systems. Network monitoring solutions should be configured to detect and block traffic containing the specific file extensions associated with this vulnerability. Additionally, user education programs should emphasize the risks of opening unknown media files and the importance of keeping software updated. The vulnerability serves as a reminder of the critical importance of proper input validation and memory management in multimedia processing applications, particularly those handling untrusted content from external sources.