CVE-2009-2663 in Firefox
Summary
by MITRE
libvorbis before r16182, as used in Mozilla Firefox 3.5.x before 3.5.2 and other products, allows context-dependent attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via a crafted .ogg file.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 04/07/2025
The vulnerability identified as CVE-2009-2663 represents a critical memory corruption issue within the libvorbis library implementation that affected widely used multimedia applications including Mozilla Firefox versions 3.5.x prior to 3.5.2. This vulnerability stems from inadequate input validation and memory management within the Ogg Vorbis audio decoding component that processes compressed audio files. The flaw exists in the library's handling of malformed or specially crafted .ogg files that contain maliciously constructed data structures which can trigger unexpected behavior during the decoding process. The vulnerability specifically impacts versions of libvorbis before revision r16182, making it a temporal issue that was addressed through subsequent library updates and version releases.
The technical exploitation of this vulnerability occurs through context-dependent attack vectors where adversaries craft malicious .ogg files that contain buffer overflows or memory corruption patterns that the libvorbis decoder fails to properly handle. When these malformed files are processed by affected applications, the decoder's memory management routines become compromised, leading to either application crashes or more severe memory corruption that could potentially enable arbitrary code execution. The vulnerability manifests as a result of insufficient bounds checking during the parsing of Ogg Vorbis packet structures, particularly in how the library handles variable length fields and metadata within the audio file format. This type of flaw falls under the CWE-121 category of buffer overflow conditions, specifically manifesting as heap-based buffer overflows that can be leveraged for privilege escalation or system compromise.
The operational impact of CVE-2009-2663 extends beyond simple denial of service scenarios to encompass potential remote code execution capabilities that make it particularly dangerous for web browsers and multimedia applications. When exploited through web-based attack vectors, this vulnerability allows attackers to execute malicious code on victim systems simply by visiting compromised websites or downloading malicious files. The vulnerability affects not only Firefox but also other applications that rely on libvorbis for audio processing, creating a widespread attack surface across multiple software platforms. The memory corruption patterns can lead to unpredictable application behavior, system instability, and potential privilege escalation depending on the execution environment and target system configuration. This vulnerability directly aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1203 for Exploitation for Client Execution, as it enables attackers to execute arbitrary code through compromised multimedia processing components.
Mitigation strategies for CVE-2009-2663 primarily involve immediate patching of affected software versions and updating libvorbis libraries to versions that include proper input validation and memory management fixes. System administrators should prioritize updating Firefox to version 3.5.2 or later, along with ensuring all applications that utilize libvorbis receive appropriate updates. Network-level defenses can include implementing content filtering to block suspicious .ogg files and employing sandboxing techniques to limit the impact of potential exploitation. Additionally, users should exercise caution when downloading multimedia content from untrusted sources and maintain updated antivirus signatures that can detect malicious .ogg files. The vulnerability highlights the importance of robust input validation in multimedia libraries and demonstrates how seemingly benign file format processing can become a vector for sophisticated attacks, emphasizing the need for comprehensive security testing in multimedia processing components. Organizations should also implement regular security assessments of third-party libraries and maintain up-to-date vulnerability management processes to prevent similar issues from affecting their systems.