CVE-2023-49502 is a high-severity buffer overflow vulnerability in Ffmpeg, specifically in versions prior to 7.0. This vulnerability allows local attackers to execute arbitrary code via the ff_bwdif_filter_intra_c function located in the libavfilter/bwdifdsp.c component. The CVSS score for this vulnerability is 8.8, indicating a high risk to organizations that utilize affected versions of the software.
The buffer overflow vulnerability arises from insufficient validation of input data, which leads to potential arbitrary code execution. This issue is particularly critical given that it can be exploited via a network, with low attack complexity, and requires no privileges on the part of the attacker. User interaction is necessary, which slightly mitigates the risk but does not eliminate it.
Risk to organizations includes unauthorized access and control over affected systems, which could lead to data breaches or service disruptions. As this vulnerability is categorized as high severity, organizations should prioritize patching immediately.
Currently, there is no public exploit available, and the CVE is not included in the Known Exploited Vulnerabilities (KEV) catalog. However, organizations must remain vigilant and monitor for any developments related to this vulnerability.
Vulnerability Details
The vulnerability is classified under CWE-120, which refers to buffer copy without checking size of input. The affected product is Ffmpeg, specifically versions from 6.1 to just below 7.0. The vulnerability was published on April 19, 2024, and its status has been modified as further details emerged.
Technical Analysis
The root cause of this vulnerability is the lack of proper input validation within the ff_bwdif_filter_intra_c function, which processes data from untrusted sources. This vulnerability can be exploited by sending specially crafted input that triggers the buffer overflow.
The attack vector is network-based, and the attack complexity is low, meaning that an attacker with basic skills could potentially exploit this vulnerability. Importantly, the attacker does not require any privileges, but user interaction is necessary to trigger the flaw.
Risk & Impact Analysis
Organizations that utilize affected versions of Ffmpeg face significant risks. The potential for arbitrary code execution presents a direct threat to the confidentiality, integrity, and availability of systems. If exploited, the blast radius could affect all applications reliant on the vulnerable components.
Given the CVSS score of 8.8, organizations should address this vulnerability in their priority patch cycle. Additionally, organizations should evaluate their exposure to this risk and consider implementing network controls to limit the potential for exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Ffmpeg versions from 6.1 to below 7.0, as well as Fedora operating system versions 38, 39, and 40.
Mitigation & Remediation
Organizations should prioritize updating to Ffmpeg version 7.0 or later to mitigate this vulnerability. If an immediate upgrade is not feasible, consider applying alternative workarounds such as disabling the ff_bwdif_filter_intra_c function in the affected versions.
Additionally, implementing network controls to restrict access to the affected components can help reduce the risk of exploitation. Regular monitoring for any unusual activity or changes in system behavior is also recommended.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for any unusual input patterns or access attempts to the affected functions. Behavioral anomalies in system performance or unexpected crashes should also be investigated thoroughly.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-49502 cannot be overstated, as it exemplifies the ongoing challenges related to buffer overflow vulnerabilities in widely used software components. Security teams must learn from this incident and enhance their input validation processes to prevent similar vulnerabilities in the future.
Organizations should also consider adopting a comprehensive vulnerability management program to proactively identify and address such weaknesses before they can be exploited.
Additionally, leveraging tools and practices for continuous security testing can help organizations maintain a strong security posture against emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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