CVE-2005-3677 in RealPlayer
Summary
by MITRE
Buffer overflow in RealNetworks RealPlayer 10 and 10.5 allows remote attackers to execute arbitrary code via a crafted image in a RealPlayer Skin (RJS) file. NOTE: due to the lack of details, it is unclear how this is different than CVE-2005-2629 and CVE-2005-2630, but the vendor advisory implies that it is different.
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Analysis
by VulDB Data Team • 06/11/2019
The vulnerability identified as CVE-2005-3677 represents a critical buffer overflow flaw within RealNetworks RealPlayer versions 10 and 10.5 that specifically targets the handling of RealPlayer Skin (RJS) files. This vulnerability resides in the software's parsing mechanism for skin files, which are used to customize the user interface of RealPlayer applications. The buffer overflow occurs when the application processes a specially crafted image embedded within an RJS file, creating an exploitable condition that can be leveraged by remote attackers to execute arbitrary code on vulnerable systems. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows an attacker to overwrite adjacent memory locations. The attack vector is particularly concerning as it can be initiated remotely through maliciously crafted RJS files delivered via web pages, email attachments, or other network-based delivery mechanisms.
The technical implementation of this vulnerability involves the improper handling of image data within RJS skin files, where the RealPlayer application fails to validate the size of image buffers before copying data into memory. When an attacker constructs a malicious RJS file containing oversized image data, the application's memory management routines overflow the allocated buffer space, potentially overwriting critical program variables, return addresses, or other memory segments. This memory corruption can be manipulated to redirect program execution flow to attacker-controlled code, enabling full system compromise. The vulnerability's exploitation requires no user interaction beyond opening the malicious file, making it particularly dangerous in automated attack scenarios. The flaw demonstrates poor input validation practices and inadequate memory boundary checking, which are fundamental security principles that should be implemented at every layer of software development.
The operational impact of CVE-2005-3677 extends beyond simple code execution, as successful exploitation can lead to complete system compromise and persistent access for attackers. Once executed, the malicious code can establish backdoors, download additional malware, or provide remote access capabilities to threat actors. The vulnerability affects a widely deployed media player application, increasing its potential attack surface significantly. Organizations running affected RealPlayer versions face substantial risk, particularly in environments where users might encounter malicious content through web browsing or email attachments. The lack of clear differentiation from CVE-2005-2629 and CVE-2005-2630 suggests this may represent a related but distinct variant of similar buffer overflow vulnerabilities within the RealPlayer codebase, highlighting the need for comprehensive patch management and vulnerability assessment processes. This vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as attackers can leverage the executed code to establish persistent access and maintain control over compromised systems.
Mitigation strategies for CVE-2005-3677 should prioritize immediate patch deployment from RealNetworks, as the vendor would have released security updates addressing the buffer overflow conditions. System administrators should implement network segmentation and access controls to limit exposure of vulnerable systems, particularly those running RealPlayer applications. Disabling RealPlayer or restricting its functionality through application whitelisting can provide temporary protection while patches are deployed. Security monitoring should focus on detecting unusual network activity or file access patterns that might indicate exploitation attempts. Additionally, user education regarding the dangers of opening unknown or untrusted RJS files can help reduce successful exploitation rates. The vulnerability underscores the importance of regular security assessments and vulnerability management processes, as similar issues in media player applications have historically been frequent targets for attackers seeking to leverage user trust and automatic execution behaviors. Organizations should also consider implementing endpoint protection solutions that can detect and block malicious RJS file content before it can be processed by vulnerable applications.