CVE-2020-13152 in Amarok
Summary
by MITRE
A remote user can create a specially crafted M3U file, media playlist file that when loaded by the target user, will trigger a memory leak, whereby Amarok 2.8.0 continue to waste resources over time, eventually allows attackers to cause a denial of service.
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Analysis
by VulDB Data Team • 03/24/2025
The vulnerability identified as CVE-2020-13152 represents a critical memory management flaw within Amarok 2.8.0, a popular open-source media player application. This issue stems from the application's improper handling of specially crafted M3U playlist files, which are standard media playlist formats used to organize and stream audio content. The vulnerability specifically affects the resource allocation mechanisms within Amarok's playlist parsing functionality, creating a condition where memory consumption increases continuously without proper garbage collection or resource deallocation.
The technical implementation of this flaw occurs when Amarok processes maliciously constructed M3U files that contain malformed or excessively nested playlist entries. The application fails to properly validate the structure and content of these playlist files, allowing attackers to craft sequences that cause the player to continuously allocate memory resources without releasing them. This memory leak manifests as a gradual consumption of system RAM, with each subsequent playlist load adding to the cumulative memory footprint. The vulnerability operates at the application layer, specifically within the media playlist parsing component, making it accessible through remote attack vectors that deliver malicious M3U files to unsuspecting users.
From an operational impact perspective, this vulnerability creates a persistent resource exhaustion condition that can severely degrade system performance or lead to complete application failure. The memory leak does not immediately crash the application but rather causes a gradual degradation of performance as system resources become increasingly consumed. This behavior makes the vulnerability particularly dangerous in environments where Amarok is used continuously or in automated systems where resource management is critical. The progressive nature of the memory consumption means that the impact may not be immediately apparent to users, allowing the condition to worsen over time until it eventually leads to a denial of service scenario where the application becomes unresponsive or crashes entirely.
The vulnerability aligns with CWE-401, which specifically addresses improper resource management and memory leaks in software applications. This classification indicates that the flaw represents a fundamental failure in resource management protocols within the application's codebase, where allocated memory is not properly freed or returned to the system after use. The attack surface is primarily through social engineering tactics where users are tricked into opening malicious playlist files, potentially delivered through phishing campaigns, malicious websites, or compromised media sharing platforms. The ATT&CK framework categorizes this vulnerability under T1203, which involves the exploitation of software vulnerabilities to achieve persistent resource consumption or denial of service conditions.
Mitigation strategies for this vulnerability should focus on immediate patching and updating to versions that address the memory management issues within Amarok's playlist handling code. System administrators should implement strict playlist file validation and filtering mechanisms, particularly for files received from untrusted sources. Network-level protections such as content filtering and sandboxing techniques can help prevent the execution of potentially malicious playlist files. Additionally, users should be educated about the risks of opening playlist files from unknown or untrusted sources, and regular system monitoring should be implemented to detect unusual memory consumption patterns that may indicate exploitation attempts. The most effective long-term solution involves updating to patched versions of Amarok that properly implement memory deallocation and resource management protocols to prevent the accumulation of unreleased memory segments during playlist processing.