CVE-2018-19357 in XMPlay
Summary
by MITRE
XMPlay 3.8.3 allows remote attackers to execute arbitrary code or cause a denial of service (stack-based buffer overflow) via a crafted http:// URL in a .m3u file.
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Analysis
by VulDB Data Team • 04/24/2020
The vulnerability identified as CVE-2018-19357 represents a critical stack-based buffer overflow flaw in XMPlay version 3.8.3 that enables remote code execution or denial of service through maliciously crafted media playlist files. This vulnerability specifically affects the handling of http:// URLs within .m3u playlist files, making it particularly dangerous in environments where users might encounter or download such files from untrusted sources. The flaw stems from insufficient input validation and bounds checking when processing URL strings within the playlist parsing mechanism, creating an exploitable condition that can be triggered through network-based attacks.
The technical implementation of this vulnerability involves a stack-based buffer overflow that occurs when XMPlay processes a maliciously constructed .m3u file containing a crafted http:// URL. The software fails to properly validate the length of URL strings before copying them into fixed-size stack buffers, allowing attackers to overwrite adjacent memory locations with malicious data. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking permits buffer overflows to occur. The overflow can potentially overwrite return addresses, function pointers, or other critical stack data structures, enabling attackers to redirect program execution flow or cause the application to crash.
From an operational perspective, this vulnerability presents significant risks to end users and organizations that utilize XMPlay for media playback, particularly in enterprise environments where automated playlist distribution or web-based media sharing occurs. The attack vector requires minimal user interaction since the vulnerability is triggered during automatic playlist parsing when the application processes .m3u files from network sources. This makes it particularly dangerous in scenarios where users might unknowingly download or receive playlist files from untrusted sources, including phishing campaigns, malicious file sharing networks, or compromised websites. The remote exploitation capability means that attackers can potentially execute arbitrary code with the privileges of the user running XMPlay, potentially leading to complete system compromise.
The impact of this vulnerability extends beyond simple denial of service, as the stack-based buffer overflow creates opportunities for privilege escalation and persistent malware deployment. Attackers could leverage this vulnerability to inject malicious code that executes with the same privileges as the XMPlay application, potentially enabling them to establish backdoors, exfiltrate data, or perform further reconnaissance within the compromised system. The vulnerability's classification aligns with ATT&CK technique T1059.007, which covers command and scripting interpreter usage, as successful exploitation could enable attackers to execute arbitrary commands through the compromised media player application. Organizations should consider this vulnerability as part of a broader attack surface that includes web-based media applications and playlist processing systems.
Mitigation strategies for CVE-2018-19357 should prioritize immediate software updates from the vendor, as the flaw has been addressed in subsequent versions of XMPlay through proper bounds checking and input validation mechanisms. Network administrators should implement strict file type filtering and content scanning for .m3u files, particularly those sourced from external or untrusted origins. Additionally, users should be educated about the risks of opening playlist files from unknown sources and the importance of keeping media player software updated. The vulnerability demonstrates the importance of input validation in multimedia applications and highlights how seemingly benign file formats like playlist files can serve as attack vectors when not properly secured against buffer overflow conditions. Security teams should also consider implementing application whitelisting policies that restrict execution of untrusted media player applications and monitor for suspicious network traffic patterns that might indicate exploitation attempts.