CVE-2009-1326 in RM Downloader
Summary
by MITRE
Stack-based buffer overflow in Mini-stream RM Downloader 3.0.0.9 allows remote attackers to execute arbitrary code via a long URI in a playlist (.m3u) file.
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Analysis
by VulDB Data Team • 11/26/2024
The vulnerability identified as CVE-2009-1326 represents a critical stack-based buffer overflow flaw within Mini-stream RM Downloader version 3.0.0.9. This software component, designed for downloading media content from streaming sources, contains a fundamental programming error that creates an exploitable condition when processing specially crafted playlist files. The vulnerability specifically manifests when the application encounters a malformed m3u playlist file containing an excessively long URI string, which exceeds the allocated buffer space on the stack during processing.
The technical implementation of this flaw stems from inadequate input validation and boundary checking mechanisms within the playlist parsing routine. When the downloader encounters a playlist file with an overly long URI, the application fails to properly constrain the length of the input data before copying it into a fixed-size stack buffer. This classic buffer overflow condition allows an attacker to overwrite adjacent memory locations, potentially corrupting the program's execution flow and enabling arbitrary code execution. The vulnerability falls under the CWE-121 stack-based buffer overflow category, which is classified as a fundamental weakness in software design that directly enables code injection attacks.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it provides remote attackers with the capability to execute malicious code with the privileges of the affected application. An attacker could craft a malicious m3u playlist file containing a specially formatted URI that, when opened by an unsuspecting user, would trigger the buffer overflow condition. This attack vector is particularly dangerous because it leverages social engineering tactics, as users might unknowingly download and open playlist files from untrusted sources. The exploitability of this vulnerability is enhanced by the fact that it requires minimal user interaction beyond opening the malicious playlist file, making it a significant threat in environments where users frequently download media content from various sources.
From a cybersecurity perspective, this vulnerability aligns with several ATT&CK tactics including initial access through malicious file downloads and execution through code injection techniques. The attack chain typically involves the distribution of malicious playlist files through compromised websites, peer-to-peer networks, or email attachments, followed by the exploitation of the buffer overflow to gain remote code execution capabilities. The vulnerability demonstrates the importance of proper input validation and memory management practices, as it could have been prevented through the implementation of bounds checking, stack canaries, or modern compiler protections such as stack overflow detection mechanisms. Organizations should prioritize patching this vulnerability immediately, as it represents a known exploit that has been documented in various security databases and could be actively exploited in the wild.
The broader implications of this vulnerability highlight the persistent challenges in legacy software security, where older applications may lack modern security features and defensive programming practices. This case study serves as a reminder of the critical need for regular security assessments, input validation enforcement, and the importance of maintaining up-to-date software versions. The vulnerability also underscores the necessity of implementing network-based security controls such as web application firewalls and content filtering systems to prevent the delivery of malicious playlist files to end users. Security practitioners should consider this vulnerability as part of their comprehensive threat modeling exercises, particularly in environments where users have access to media downloading applications that may be susceptible to similar buffer overflow conditions in other software components.