CVE-2012-5361 in FFmpeg
Summary
by MITRE
Libavcodec in FFmpeg before 0.11 allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code.
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Analysis
by VulDB Data Team • 09/10/2020
The vulnerability identified as CVE-2012-5361 represents a critical security flaw within the libavcodec component of FFmpeg software, affecting versions prior to 0.11. This issue resides in the multimedia processing library that handles various audio and video codecs, making it a significant concern for applications relying on FFmpeg for media handling. The vulnerability stems from insufficient input validation and memory management within the codec processing functions, creating opportunities for malicious actors to exploit the system through crafted media files. The flaw manifests as a buffer over-read condition that can be triggered when processing specially crafted input data, leading to unpredictable behavior in the affected applications. The vulnerability has been classified under CWE-125 as an out-of-bounds read, which is a common class of memory corruption vulnerabilities that can lead to both denial of service and potential code execution scenarios.
The technical exploitation of this vulnerability occurs when a remote attacker crafts malicious media content that, when processed by an affected FFmpeg installation, triggers the buffer over-read condition. This condition typically arises during the decoding process of specific video or audio codecs where the software attempts to read memory locations beyond the allocated buffer boundaries. The flaw can be leveraged to cause application crashes through memory corruption or potentially execute arbitrary code if the attacker can control the data read from the corrupted memory regions. The impact extends beyond simple application instability as the vulnerability can be exploited in web applications, media processing systems, and any environment where FFmpeg is used to handle untrusted media input. Attackers can leverage this vulnerability through various attack vectors including web browsers, media servers, or any application that incorporates FFmpeg for media processing, making it particularly dangerous in widely deployed software environments.
The operational impact of CVE-2012-5361 is substantial across multiple threat scenarios, as it affects a core multimedia processing library used by numerous applications and services. Organizations running web servers, content management systems, media processing platforms, or any software that processes user-uploaded media files face significant risk from this vulnerability. The potential for remote code execution makes it particularly attractive to threat actors, as it can be exploited without requiring local access to the target system. The vulnerability's exploitation can lead to complete system compromise, data exfiltration, or service disruption depending on the specific implementation and environment. Security researchers have noted that the vulnerability's exploitation is relatively straightforward, requiring only the creation of a specially crafted media file that triggers the buffer over-read condition during normal processing operations. This characteristic makes it a preferred target for automated attack tools and increases the overall risk exposure for affected systems.
Mitigation strategies for CVE-2012-5361 primarily focus on immediate software updates and patches provided by FFmpeg maintainers, as version 0.11 and later versions contain fixes for the identified buffer over-read conditions. System administrators should prioritize updating all FFmpeg installations to the latest stable versions, particularly those that are actively used in production environments. Additional protective measures include implementing strict input validation and sanitization for all media processing applications, using sandboxing techniques to limit the impact of potential exploitation, and deploying network-based intrusion detection systems to monitor for exploitation attempts. Organizations should also consider implementing content filtering mechanisms to prevent processing of untrusted media files and establishing robust patch management procedures to ensure timely deployment of security updates. The vulnerability's classification under ATT&CK technique T1203 - Exploitation for Client Execution indicates that it can be used as a method for initial access or privilege escalation in broader attack chains, further emphasizing the need for comprehensive mitigation strategies. Security monitoring should specifically target anomalous media processing patterns that might indicate exploitation attempts, as the vulnerability's effects can be subtle and may not immediately manifest as obvious system failures.